231120010021121 has 4 divisors (see below), whose sum is σ = 248898472330452. Its totient is φ = 213341547711792.

The previous prime is 231120010021049. The next prime is 231120010021249. The reversal of 231120010021121 is 121120010021132.

It is a happy number.

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 20639803041025 + 210480206980096 = 4543105^2 + 14507936^2 .

It is a cyclic number.

It is not a de Polignac number, because 231120010021121 - 2⁴² = 226721963510017 is a prime.

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 231120010021121.

It is not an unprimeable number, because it can be changed into a prime (231120010020121) 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, 8889231154646 + ... + 8889231154671.

It is an arithmetic number, because the mean of its divisors is an integer number (62224618082613).

Almost surely, 2^{231120010021121} is an apocalyptic number.

It is an amenable number.

231120010021121 is a deficient number, since it is larger than the sum of its proper divisors (17778462309331).

231120010021121 is a wasteful number, since it uses less digits than its factorization.

231120010021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17778462309330.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 231120010021121 its reverse (121120010021132), we get a palindrome (352240020042253).

The spelling of 231120010021121 in words is "two hundred thirty-one trillion, one hundred twenty billion, ten million, twenty-one thousand, one hundred twenty-one".