129700099321 has 15 divisors (see below), whose sum is σ = 140574028713. Its totient is φ = 119666986920.

The previous prime is 129700099313. The next prime is 129700099339. The reversal of 129700099321 is 123990007921.

The square root of 129700099321 is 360139.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 64307380921 + 65392718400 = 253589^2 + 255720^2 .

It is not a de Polignac number, because 129700099321 - 2³ = 129700099313 is a prime.

It is a super-2 number, since 2×129700099321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129700099021) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 60862426 + ... + 60864556.

Almost surely, 2^129700099321 is an apocalyptic number.

129700099321 is the 360139-th square number.

129700099321 is the 180070-th centered octagonal number.

It is an amenable number.

129700099321 is a deficient number, since it is larger than the sum of its proper divisors (10873929392).

129700099321 is an frugal number, since it uses more digits than its factorization.

129700099321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314 (or 2144 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 129700099321 in words is "one hundred twenty-nine billion, seven hundred million, ninety-nine thousand, three hundred twenty-one".