1331513630821 has 16 divisors (see below), whose sum is σ = 1458150740928. Its totient is φ = 1205814297600.

The previous prime is 1331513630779. The next prime is 1331513630831. The reversal of 1331513630821 is 1280363151331.

It is not a de Polignac number, because 1331513630821 - 2³¹ = 1329366147173 is a prime.

It is a super-2 number, since 2×1331513630821² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331513630831) 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, 4280851 + ... + 4581343.

It is an arithmetic number, because the mean of its divisors is an integer number (91134421308).

Almost surely, 2^{1331513630821} is an apocalyptic number.

1331513630821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331513630821 is a deficient number, since it is larger than the sum of its proper divisors (126637110107).

1331513630821 is a wasteful number, since it uses less digits than its factorization.

1331513630821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302052.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 1331513630821 in words is "one trillion, three hundred thirty-one billion, five hundred thirteen million, six hundred thirty thousand, eight hundred twenty-one".