1331051100021 has 12 divisors (see below), whose sum is σ = 1937768182272. Its totient is φ = 880380254376.

The previous prime is 1331051100017. The next prime is 1331051100023. The reversal of 1331051100021 is 1200011501331.

1331051100021 is a `hidden beast` number, since 133 + 1 + 0 + 511 + 0 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 1331051100021 - 2² = 1331051100017 is a prime.

It is a super-2 number, since 2×1331051100021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331051099967 and 1331051100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331051100023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 582260931 + ... + 582263216.

It is an arithmetic number, because the mean of its divisors is an integer number (161480681856).

Almost surely, 2^{1331051100021} is an apocalyptic number.

It is an amenable number.

1331051100021 is a deficient number, since it is larger than the sum of its proper divisors (606717082251).

1331051100021 is a wasteful number, since it uses less digits than its factorization.

1331051100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164524280 (or 1164524277 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 1331051100021 its reverse (1200011501331), we get a palindrome (2531062601352).

The spelling of 1331051100021 in words is "one trillion, three hundred thirty-one billion, fifty-one million, one hundred thousand, twenty-one".