21010113320031 has 12 divisors (see below), whose sum is σ = 33106845231720. Its totient is φ = 12733402012080.

The previous prime is 21010113320029. The next prime is 21010113320047. The reversal of 21010113320031 is 13002331101012.

21010113320031 is a `hidden beast` number, since 210 + 101 + 1 + 3 + 320 + 0 + 31 = 666.

It is not a de Polignac number, because 21010113320031 - 2¹ = 21010113320029 is a prime.

It is a super-2 number, since 2×21010113320031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21010113319986 and 21010113320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010113320731) 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, 106111683336 + ... + 106111683533.

It is an arithmetic number, because the mean of its divisors is an integer number (2758903769310).

Almost surely, 2^{21010113320031} is an apocalyptic number.

21010113320031 is a deficient number, since it is larger than the sum of its proper divisors (12096731911689).

21010113320031 is a wasteful number, since it uses less digits than its factorization.

21010113320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212223366886 (or 212223366883 counting only the distinct ones).

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

Adding to 21010113320031 its reverse (13002331101012), we get a palindrome (34012444421043).

The spelling of 21010113320031 in words is "twenty-one trillion, ten billion, one hundred thirteen million, three hundred twenty thousand, thirty-one".