130200021 has 16 divisors (see below), whose sum is σ = 220444800. Its totient is φ = 74399904.

The previous prime is 130200017. The next prime is 130200023. The reversal of 130200021 is 120002031.

It is a happy number.

It is not a de Polignac number, because 130200021 - 2² = 130200017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 130199976 and 130200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130200023) 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, 344256 + ... + 344633.

It is an arithmetic number, because the mean of its divisors is an integer number (13777800).

Almost surely, 2^130200021 is an apocalyptic number.

It is an amenable number.

130200021 is a deficient number, since it is larger than the sum of its proper divisors (90244779).

130200021 is an equidigital number, since it uses as much as digits as its factorization.

130200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688905 (or 688899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 130200021 is about 11410.5223806800. The cubic root of 130200021 is about 506.8393805130.

Adding to 130200021 its reverse (120002031), we get a palindrome (250202052).

The spelling of 130200021 in words is "one hundred thirty million, two hundred thousand, twenty-one".