1200121311213 has 48 divisors (see below), whose sum is σ = 1940495356800. Its totient is φ = 708408038400.

The previous prime is 1200121311211. The next prime is 1200121311269. The reversal of 1200121311213 is 3121131210021.

1200121311213 is a `hidden beast` number, since 1 + 20 + 0 + 121 + 311 + 213 = 666.

It is not a de Polignac number, because 1200121311213 - 2¹ = 1200121311211 is a prime.

It is a super-2 number, since 2×1200121311213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121311211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2157688 + ... + 2656286.

It is an arithmetic number, because the mean of its divisors is an integer number (40426986600).

Almost surely, 2^{1200121311213} is an apocalyptic number.

It is an amenable number.

1200121311213 is a deficient number, since it is larger than the sum of its proper divisors (740374045587).

1200121311213 is a wasteful number, since it uses less digits than its factorization.

1200121311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499250 (or 499247 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1200121311213 its reverse (3121131210021), we get a palindrome (4321252521234).

The spelling of 1200121311213 in words is "one trillion, two hundred billion, one hundred twenty-one million, three hundred eleven thousand, two hundred thirteen".