130251021 has 4 divisors (see below), whose sum is σ = 173668032. Its totient is φ = 86834012.

The previous prime is 130250983. The next prime is 130251031. The reversal of 130251021 is 120152031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130251021 - 2⁷ = 130250893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130251031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21708501 + ... + 21708506.

It is an arithmetic number, because the mean of its divisors is an integer number (43417008).

Almost surely, 2^130251021 is an apocalyptic number.

It is an amenable number.

130251021 is a deficient number, since it is larger than the sum of its proper divisors (43417011).

130251021 is an equidigital number, since it uses as much as digits as its factorization.

130251021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43417010.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 130251021 is about 11412.7569412478. The cubic root of 130251021 is about 506.9055490484.

The spelling of 130251021 in words is "one hundred thirty million, two hundred fifty-one thousand, twenty-one".