20211112320021 has 24 divisors (see below), whose sum is σ = 33364810664640. Its totient is φ = 11549056542336.

The previous prime is 20211112319987. The next prime is 20211112320037. The reversal of 20211112320021 is 12002321111202.

20211112320021 is a `hidden beast` number, since 2 + 0 + 211 + 112 + 320 + 0 + 21 = 666.

It is not a de Polignac number, because 20211112320021 - 2²³ = 20211103931413 is a prime.

It is a super-2 number, since 2×20211112320021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211112319976 and 20211112320003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211112320041) 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 23 ways as a sum of consecutive naturals, for example, 2875645 + ... + 6977933.

It is an arithmetic number, because the mean of its divisors is an integer number (1390200444360).

Almost surely, 2^{20211112320021} is an apocalyptic number.

20211112320021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20211112320021 is a deficient number, since it is larger than the sum of its proper divisors (13153698344619).

20211112320021 is a wasteful number, since it uses less digits than its factorization.

20211112320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4180505 (or 4180502 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20211112320021 its reverse (12002321111202), we get a palindrome (32213433431223).

The spelling of 20211112320021 in words is "twenty trillion, two hundred eleven billion, one hundred twelve million, three hundred twenty thousand, twenty-one".