1331012112021 has 72 divisors (see below), whose sum is σ = 2069685954336. Its totient is φ = 823722419520.

The previous prime is 1331012111983. The next prime is 1331012112061. The reversal of 1331012112021 is 1202112101331.

It is not a de Polignac number, because 1331012112021 - 2³⁴ = 1313832242837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1331012111985 and 1331012112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331012112061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32120806 + ... + 32162216.

Almost surely, 2^{1331012112021} is an apocalyptic number.

It is an amenable number.

1331012112021 is a deficient number, since it is larger than the sum of its proper divisors (738673842315).

1331012112021 is a wasteful number, since it uses less digits than its factorization.

1331012112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41663 (or 41637 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1331012112021 its reverse (1202112101331), we get a palindrome (2533124213352).

The spelling of 1331012112021 in words is "one trillion, three hundred thirty-one billion, twelve million, one hundred twelve thousand, twenty-one".