121311230535321 has 16 divisors (see below), whose sum is σ = 163700139516480. Its totient is φ = 79898274019520.

The previous prime is 121311230535293. The next prime is 121311230535331. The reversal of 121311230535321 is 123535032113121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121311230535321 - 2²⁵ = 121311196980889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121311230535331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8888695 + ... + 17934083.

It is an arithmetic number, because the mean of its divisors is an integer number (10231258719780).

Almost surely, 2^{121311230535321} is an apocalyptic number.

It is an amenable number.

121311230535321 is a deficient number, since it is larger than the sum of its proper divisors (42388908981159).

121311230535321 is an equidigital number, since it uses as much as digits as its factorization.

121311230535321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9099336.

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 121311230535321 its reverse (123535032113121), we get a palindrome (244846262648442).

The spelling of 121311230535321 in words is "one hundred twenty-one trillion, three hundred eleven billion, two hundred thirty million, five hundred thirty-five thousand, three hundred twenty-one".