121131002131 has 2 divisors, whose sum is σ = 121131002132. Its totient is φ = 121131002130.

The previous prime is 121131002129. The next prime is 121131002143. The reversal of 121131002131 is 131200131121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121131002131 - 2¹ = 121131002129 is a prime.

It is a super-2 number, since 2×121131002131² (a number of 23 digits) contains 22 as substring.

Together with 121131002129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121131002431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565501065 + 60565501066.

It is an arithmetic number, because the mean of its divisors is an integer number (60565501066).

Almost surely, 2^121131002131 is an apocalyptic number.

121131002131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131002131 is an equidigital number, since it uses as much as digits as its factorization.

121131002131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121131002131 its reverse (131200131121), we get a palindrome (252331133252).

The spelling of 121131002131 in words is "one hundred twenty-one billion, one hundred thirty-one million, two thousand, one hundred thirty-one".