21010120013331 has 24 divisors (see below), whose sum is σ = 30889752251904. Its totient is φ = 13758868569600.

The previous prime is 21010120013329. The next prime is 21010120013339. The reversal of 21010120013331 is 13331002101012.

21010120013331 is a `hidden beast` number, since 21 + 0 + 101 + 200 + 13 + 331 = 666.

It is not a de Polignac number, because 21010120013331 - 2¹ = 21010120013329 is a prime.

It is a super-2 number, since 2×21010120013331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010120013339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90882366 + ... + 91113251.

It is an arithmetic number, because the mean of its divisors is an integer number (1287073010496).

Almost surely, 2^{21010120013331} is an apocalyptic number.

21010120013331 is a deficient number, since it is larger than the sum of its proper divisors (9879632238573).

21010120013331 is a wasteful number, since it uses less digits than its factorization.

21010120013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181995851 (or 181995848 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21010120013331 its reverse (13331002101012), we get a palindrome (34341122114343).

The spelling of 21010120013331 in words is "twenty-one trillion, ten billion, one hundred twenty million, thirteen thousand, three hundred thirty-one".