1310680021 has 16 divisors (see below), whose sum is σ = 1588815360. Its totient is φ = 1056173040.

The previous prime is 1310680013. The next prime is 1310680039. The reversal of 1310680021 is 1200860131.

It is a cyclic number.

It is not a de Polignac number, because 1310680021 - 2³ = 1310680013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310679974 and 1310680001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310680061) 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, 20191 + ... + 55036.

It is an arithmetic number, because the mean of its divisors is an integer number (99300960).

Almost surely, 2^1310680021 is an apocalyptic number.

It is an amenable number.

1310680021 is a deficient number, since it is larger than the sum of its proper divisors (278135339).

1310680021 is a wasteful number, since it uses less digits than its factorization.

1310680021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75384.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1310680021 is about 36203.3150553924. The cubic root of 1310680021 is about 1094.3734789487.

The spelling of 1310680021 in words is "one billion, three hundred ten million, six hundred eighty thousand, twenty-one".