131121930 has 16 divisors (see below), whose sum is σ = 314692704. Its totient is φ = 34965840.

The previous prime is 131121929. The next prime is 131121953. The reversal of 131121930 is 39121131.

It is a junction number, because it is equal to n+sod(n) for n = 131121897 and 131121906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185336 + ... + 2185395.

It is an arithmetic number, because the mean of its divisors is an integer number (19668294).

Almost surely, 2^131121930 is an apocalyptic number.

131121930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131121930 is an abundant number, since it is smaller than the sum of its proper divisors (183570774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131121930 is a wasteful number, since it uses less digits than its factorization.

131121930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370741.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 131121930 is about 11450.8484401812. The cubic root of 131121930 is about 508.0328295273.

The spelling of 131121930 in words is "one hundred thirty-one million, one hundred twenty-one thousand, nine hundred thirty".