121310200131 has 4 divisors (see below), whose sum is σ = 161746933512. Its totient is φ = 80873466752.

The previous prime is 121310200127. The next prime is 121310200157. The reversal of 121310200131 is 131002013121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121310200131 - 2² = 121310200127 is a prime.

It is a super-2 number, since 2×121310200131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121310200131.

It is not an unprimeable number, because it can be changed into a prime (121310200111) 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, 20218366686 + ... + 20218366691.

It is an arithmetic number, because the mean of its divisors is an integer number (40436733378).

Almost surely, 2^121310200131 is an apocalyptic number.

121310200131 is a deficient number, since it is larger than the sum of its proper divisors (40436733381).

121310200131 is an equidigital number, since it uses as much as digits as its factorization.

121310200131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40436733380.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121310200131 its reverse (131002013121), we get a palindrome (252312213252).

The spelling of 121310200131 in words is "one hundred twenty-one billion, three hundred ten million, two hundred thousand, one hundred thirty-one".