130121992 has 64 divisors (see below), whose sum is σ = 327600000. Its totient is φ = 46794240.

The previous prime is 130121977. The next prime is 130121993. The reversal of 130121992 is 299121031.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 130121992.

It is not an unprimeable number, because it can be changed into a prime (130121993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117 + ... + 16132.

It is an arithmetic number, because the mean of its divisors is an integer number (5118750).

Almost surely, 2^130121992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130121992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163800000).

130121992 is an abundant number, since it is smaller than the sum of its proper divisors (197478008).

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

130121992 is a wasteful number, since it uses less digits than its factorization.

130121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16286 (or 16282 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 130121992 is about 11407.1026996341. The cubic root of 130121992 is about 506.7381105010.

The spelling of 130121992 in words is "one hundred thirty million, one hundred twenty-one thousand, nine hundred ninety-two".