231021123002111 has 4 divisors (see below), whose sum is σ = 248791978617672. Its totient is φ = 213250267386552.

The previous prime is 231021123002093. The next prime is 231021123002177. The reversal of 231021123002111 is 111200321120132.

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

It is a cyclic number.

It is not a de Polignac number, because 231021123002111 - 2³⁸ = 230746245095167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021123002311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8885427807761 + ... + 8885427807786.

It is an arithmetic number, because the mean of its divisors is an integer number (62197994654418).

Almost surely, 2^{231021123002111} is an apocalyptic number.

231021123002111 is a deficient number, since it is larger than the sum of its proper divisors (17770855615561).

231021123002111 is a wasteful number, since it uses less digits than its factorization.

231021123002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770855615560.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 231021123002111 its reverse (111200321120132), we get a palindrome (342221444122243).

The spelling of 231021123002111 in words is "two hundred thirty-one trillion, twenty-one billion, one hundred twenty-three million, two thousand, one hundred eleven".