1213210013 has 4 divisors (see below), whose sum is σ = 1239023040. Its totient is φ = 1187396988.

The previous prime is 1213210007. The next prime is 1213210039. The reversal of 1213210013 is 3100123121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3100123121 = 50587 ⋅61283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213210013 is a prime.

It is a super-3 number, since 3×1213210013³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213210013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213210073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12906443 + ... + 12906536.

It is an arithmetic number, because the mean of its divisors is an integer number (309755760).

Almost surely, 2^1213210013 is an apocalyptic number.

It is an amenable number.

1213210013 is a deficient number, since it is larger than the sum of its proper divisors (25813027).

1213210013 is an equidigital number, since it uses as much as digits as its factorization.

1213210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25813026.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213210013 is about 34831.1643933992. The cubic root of 1213210013 is about 1066.5437179361.

Adding to 1213210013 its reverse (3100123121), we get a palindrome (4313333134).

The spelling of 1213210013 in words is "one billion, two hundred thirteen million, two hundred ten thousand, thirteen".