231323020111 has 4 divisors (see below), whose sum is σ = 233088844824. Its totient is φ = 229557195400.

The previous prime is 231323020079. The next prime is 231323020127. The reversal of 231323020111 is 111020323132.

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 231323020111 - 2⁵ = 231323020079 is a prime.

It is a super-2 number, since 2×231323020111² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323020171) 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, 882912160 + ... + 882912421.

It is an arithmetic number, because the mean of its divisors is an integer number (58272211206).

Almost surely, 2^231323020111 is an apocalyptic number.

231323020111 is a deficient number, since it is larger than the sum of its proper divisors (1765824713).

231323020111 is a wasteful number, since it uses less digits than its factorization.

231323020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765824712.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231323020111 its reverse (111020323132), we get a palindrome (342343343243).

The spelling of 231323020111 in words is "two hundred thirty-one billion, three hundred twenty-three million, twenty thousand, one hundred eleven".