121323223231 has 16 divisors (see below), whose sum is σ = 139705832448. Its totient is φ = 103205642400.

The previous prime is 121323223199. The next prime is 121323223243. The reversal of 121323223231 is 132322323121.

It is not a de Polignac number, because 121323223231 - 2⁵ = 121323223199 is a prime.

It is a super-2 number, since 2×121323223231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121323223196 and 121323223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323223261) 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, 524586 + ... + 719608.

It is an arithmetic number, because the mean of its divisors is an integer number (8731614528).

Almost surely, 2^121323223231 is an apocalyptic number.

121323223231 is a deficient number, since it is larger than the sum of its proper divisors (18382609217).

121323223231 is a wasteful number, since it uses less digits than its factorization.

121323223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195702.

The product of its digits is 2592, while the sum is 25.

Adding to 121323223231 its reverse (132322323121), we get a palindrome (253645546352).

The spelling of 121323223231 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred twenty-three thousand, two hundred thirty-one".