231220120223 has 16 divisors (see below), whose sum is σ = 236231704800. Its totient is φ = 226271760384.

The previous prime is 231220120217. The next prime is 231220120249. The reversal of 231220120223 is 322021022132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231220120223 - 2²⁶ = 231153011359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231220120195 and 231220120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220120253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3701453 + ... + 3763401.

It is an arithmetic number, because the mean of its divisors is an integer number (14764481550).

Almost surely, 2^231220120223 is an apocalyptic number.

231220120223 is a deficient number, since it is larger than the sum of its proper divisors (5011584577).

231220120223 is a wasteful number, since it uses less digits than its factorization.

231220120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62458.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231220120223 its reverse (322021022132), we get a palindrome (553241142355).

The spelling of 231220120223 in words is "two hundred thirty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-three".