121203012231 has 32 divisors (see below), whose sum is σ = 205314137600. Its totient is φ = 69224207040.

The previous prime is 121203012199. The next prime is 121203012239. The reversal of 121203012231 is 132210302121.

121203012231 is a `hidden beast` number, since 12 + 120 + 301 + 2 + 231 = 666.

It is not a de Polignac number, because 121203012231 - 2⁵ = 121203012199 is a prime.

It is a super-2 number, since 2×121203012231² (a number of 23 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 (121203012239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220635 + ... + 539523.

It is an arithmetic number, because the mean of its divisors is an integer number (6416066800).

Almost surely, 2^121203012231 is an apocalyptic number.

121203012231 is a deficient number, since it is larger than the sum of its proper divisors (84111125369).

121203012231 is a wasteful number, since it uses less digits than its factorization.

121203012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320916 (or 320910 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121203012231 its reverse (132210302121), we get a palindrome (253413314352).

The spelling of 121203012231 in words is "one hundred twenty-one billion, two hundred three million, twelve thousand, two hundred thirty-one".