131121002131 has 6 divisors (see below), whose sum is σ = 152528512740. Its totient is φ = 112389430356.

The previous prime is 131121002123. The next prime is 131121002147. The reversal of 131121002131 is 131200121131.

It is a happy number.

It is not a de Polignac number, because 131121002131 - 2³ = 131121002123 is a prime.

It is a super-2 number, since 2×131121002131² (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 (131121002101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1337969361 + ... + 1337969458.

It is an arithmetic number, because the mean of its divisors is an integer number (25421418790).

Almost surely, 2^131121002131 is an apocalyptic number.

131121002131 is a deficient number, since it is larger than the sum of its proper divisors (21407510609).

131121002131 is an equidigital number, since it uses as much as digits as its factorization.

131121002131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675938833 (or 2675938826 counting only the distinct ones).

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

Adding to 131121002131 its reverse (131200121131), we get a palindrome (262321123262).

The spelling of 131121002131 in words is "one hundred thirty-one billion, one hundred twenty-one million, two thousand, one hundred thirty-one".