1331332011021 has 16 divisors (see below), whose sum is σ = 1776067610240. Its totient is φ = 887075686080.

The previous prime is 1331332011011. The next prime is 1331332011073. The reversal of 1331332011021 is 1201102331331.

It is a happy number.

It is not a de Polignac number, because 1331332011021 - 2¹⁵ = 1331331978253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331332011011) 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, 47991471 + ... + 48019203.

It is an arithmetic number, because the mean of its divisors is an integer number (111004225640).

Almost surely, 2^{1331332011021} is an apocalyptic number.

It is an amenable number.

1331332011021 is a deficient number, since it is larger than the sum of its proper divisors (444735599219).

1331332011021 is a wasteful number, since it uses less digits than its factorization.

1331332011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35796.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1331332011021 its reverse (1201102331331), we get a palindrome (2532434342352).

The spelling of 1331332011021 in words is "one trillion, three hundred thirty-one billion, three hundred thirty-two million, eleven thousand, twenty-one".