130120921 has 24 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 107956800.

The previous prime is 130120849. The next prime is 130120927. The reversal of 130120921 is 129021031.

It is not a de Polignac number, because 130120921 - 2⁹ = 130120409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130120927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480016 + ... + 480286.

It is an arithmetic number, because the mean of its divisors is an integer number (6511680).

Almost surely, 2^130120921 is an apocalyptic number.

It is an amenable number.

130120921 is a deficient number, since it is larger than the sum of its proper divisors (26159399).

130120921 is a wasteful number, since it uses less digits than its factorization.

130120921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 130120921 is about 11407.0557551018. The cubic root of 130120921 is about 506.7367202210.

Adding to 130120921 its reverse (129021031), we get a palindrome (259141952).

It can be divided in two parts, 1301 and 20921, that added together give a palindrome (22222).

The spelling of 130120921 in words is "one hundred thirty million, one hundred twenty thousand, nine hundred twenty-one".