130000699721 has 4 divisors (see below), whose sum is σ = 134483482500. Its totient is φ = 125517916944.

The previous prime is 130000699681. The next prime is 130000699747. The reversal of 130000699721 is 127996000031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111131556496 + 18869143225 = 333364^2 + 137365^2 .

It is a cyclic number.

It is not a de Polignac number, because 130000699721 - 2⁶ = 130000699657 is a prime.

It is a super-3 number, since 3×130000699721³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130000699771) 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, 2241391346 + ... + 2241391403.

It is an arithmetic number, because the mean of its divisors is an integer number (33620870625).

Almost surely, 2^130000699721 is an apocalyptic number.

It is an amenable number.

130000699721 is a deficient number, since it is larger than the sum of its proper divisors (4482782779).

130000699721 is an equidigital number, since it uses as much as digits as its factorization.

130000699721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482782778.

The product of its (nonzero) digits is 20412, while the sum is 38.

Adding to 130000699721 its reverse (127996000031), we get a palindrome (257996699752).

The spelling of 130000699721 in words is "one hundred thirty billion, six hundred ninety-nine thousand, seven hundred twenty-one".