31052120121361 has 4 divisors (see below), whose sum is σ = 31052613693924. Its totient is φ = 31051626548800.

The previous prime is 31052120121313. The next prime is 31052120121383. The reversal of 31052120121361 is 16312102125013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22991881150225 + 8060238971136 = 4794985^2 + 2839056^2 .

It is a cyclic number.

It is not a de Polignac number, because 31052120121361 - 2²⁵ = 31052086566929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31052120191361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246691900 + ... + 246817741.

It is an arithmetic number, because the mean of its divisors is an integer number (7763153423481).

Almost surely, 2^{31052120121361} is an apocalyptic number.

It is an amenable number.

31052120121361 is a deficient number, since it is larger than the sum of its proper divisors (493572563).

31052120121361 is an equidigital number, since it uses as much as digits as its factorization.

31052120121361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493572562.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 31052120121361 its reverse (16312102125013), we get a palindrome (47364222246374).

The spelling of 31052120121361 in words is "thirty-one trillion, fifty-two billion, one hundred twenty million, one hundred twenty-one thousand, three hundred sixty-one".