121122312131 has 4 divisors (see below), whose sum is σ = 121251029664. Its totient is φ = 120993594600.

The previous prime is 121122312097. The next prime is 121122312161. The reversal of 121122312131 is 131213221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131213221121 = 2689 ⋅48796289.

It is a cyclic number.

It is not a de Polignac number, because 121122312131 - 2¹⁸ = 121122049987 is a prime.

It is a super-2 number, since 2×121122312131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122312161) 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, 64357355 + ... + 64359236.

It is an arithmetic number, because the mean of its divisors is an integer number (30312757416).

Almost surely, 2^121122312131 is an apocalyptic number.

121122312131 is a deficient number, since it is larger than the sum of its proper divisors (128717533).

121122312131 is an equidigital number, since it uses as much as digits as its factorization.

121122312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128717532.

The product of its digits is 144, while the sum is 20.

Adding to 121122312131 its reverse (131213221121), we get a palindrome (252335533252).

The spelling of 121122312131 in words is "one hundred twenty-one billion, one hundred twenty-two million, three hundred twelve thousand, one hundred thirty-one".