121131113231 has 8 divisors (see below), whose sum is σ = 131903209200. Its totient is φ = 110798694720.

The previous prime is 121131113209. The next prime is 121131113239. The reversal of 121131113231 is 132311131121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121131113231 is a prime.

It is a super-2 number, since 2×121131113231² (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 (121131113239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109918790 + ... + 109919891.

It is an arithmetic number, because the mean of its divisors is an integer number (16487901150).

Almost surely, 2^121131113231 is an apocalyptic number.

121131113231 is a deficient number, since it is larger than the sum of its proper divisors (10772095969).

121131113231 is a wasteful number, since it uses less digits than its factorization.

121131113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219838729.

The product of its digits is 108, while the sum is 20.

Adding to 121131113231 its reverse (132311131121), we get a palindrome (253442244352).

The spelling of 121131113231 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-one".