130221512 has 8 divisors (see below), whose sum is σ = 244165350. Its totient is φ = 65110752.

The previous prime is 130221503. The next prime is 130221517. The reversal of 130221512 is 215122031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 128278276 + 1943236 = 11326^2 + 1394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×130221512² = 33915284375132288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (130221517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8138837 + ... + 8138852.

Almost surely, 2^130221512 is an apocalyptic number.

It is an amenable number.

130221512 is a deficient number, since it is larger than the sum of its proper divisors (113943838).

130221512 is a wasteful number, since it uses less digits than its factorization.

130221512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16277695 (or 16277691 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 130221512 is about 11411.4640603211. The cubic root of 130221512 is about 506.8672655210.

Adding to 130221512 its reverse (215122031), we get a palindrome (345343543).

The spelling of 130221512 in words is "one hundred thirty million, two hundred twenty-one thousand, five hundred twelve".