121321213013 has 64 divisors (see below), whose sum is σ = 164568122880. Its totient is φ = 87089333760.

The previous prime is 121321213001. The next prime is 121321213049. The reversal of 121321213013 is 310312123121.

It is a happy number.

It is not a de Polignac number, because 121321213013 - 2⁶ = 121321212949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321213093) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113489843 + ... + 113490911.

It is an arithmetic number, because the mean of its divisors is an integer number (2571376920).

Almost surely, 2^121321213013 is an apocalyptic number.

121321213013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121321213013 is a deficient number, since it is larger than the sum of its proper divisors (43246909867).

121321213013 is a wasteful number, since it uses less digits than its factorization.

121321213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121321213013 its reverse (310312123121), we get a palindrome (431633336134).

The spelling of 121321213013 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, thirteen".