231120010021123 has 4 divisors (see below), whose sum is σ = 232455963836448. Its totient is φ = 229784056205800.

The previous prime is 231120010021049. The next prime is 231120010021249. The reversal of 231120010021123 is 321120010021132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231120010021123 is a prime.

It is a super-2 number, since 2×231120010021123² (a number of 30 digits) contains 22 as substring.

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 231120010021123.

It is not an unprimeable number, because it can be changed into a prime (231120010121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667976907403 + ... + 667976907748.

It is an arithmetic number, because the mean of its divisors is an integer number (58113990959112).

Almost surely, 2^{231120010021123} is an apocalyptic number.

231120010021123 is a deficient number, since it is larger than the sum of its proper divisors (1335953815325).

231120010021123 is a wasteful number, since it uses less digits than its factorization.

231120010021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335953815324.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231120010021123 its reverse (321120010021132), we get a palindrome (552240020042255).

Subtracting 231120010021123 from its reverse (321120010021132), we obtain a palindrome (90000000000009).

The spelling of 231120010021123 in words is "two hundred thirty-one trillion, one hundred twenty billion, ten million, twenty-one thousand, one hundred twenty-three".