20211020002131 has 64 divisors (see below), whose sum is σ = 33111687168000. Its totient is φ = 10707459417216.

The previous prime is 20211020002051. The next prime is 20211020002181. The reversal of 20211020002131 is 13120002011202.

It is not a de Polignac number, because 20211020002131 - 2¹⁸ = 20211019739987 is a prime.

It is a super-2 number, since 2×20211020002131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211020002131.

It is not an unprimeable number, because it can be changed into a prime (20211020002181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214168345 + ... + 214262693.

It is an arithmetic number, because the mean of its divisors is an integer number (517370112000).

Almost surely, 2^{20211020002131} is an apocalyptic number.

20211020002131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20211020002131 is a deficient number, since it is larger than the sum of its proper divisors (12900667165869).

20211020002131 is a wasteful number, since it uses less digits than its factorization.

20211020002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105848.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20211020002131 its reverse (13120002011202), we get a palindrome (33331022013333).

The spelling of 20211020002131 in words is "twenty trillion, two hundred eleven billion, twenty million, two thousand, one hundred thirty-one".