20122201200021 has 16 divisors (see below), whose sum is σ = 26937100270080. Its totient is φ = 13361053878000.

The previous prime is 20122201200019. The next prime is 20122201200047. The reversal of 20122201200021 is 12000210222102.

It is not a de Polignac number, because 20122201200021 - 2¹ = 20122201200019 is a prime.

It is a super-2 number, since 2×20122201200021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122201200011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35989320 + ... + 36544158.

It is an arithmetic number, because the mean of its divisors is an integer number (1683568766880).

Almost surely, 2^{20122201200021} is an apocalyptic number.

It is an amenable number.

20122201200021 is a deficient number, since it is larger than the sum of its proper divisors (6814899070059).

20122201200021 is a wasteful number, since it uses less digits than its factorization.

20122201200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603256.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20122201200021 its reverse (12000210222102), we get a palindrome (32122411422123).

The spelling of 20122201200021 in words is "twenty trillion, one hundred twenty-two billion, two hundred one million, two hundred thousand, twenty-one".