22111001200021 has 16 divisors (see below), whose sum is σ = 23913269487360. Its totient is φ = 20364598264320.

The previous prime is 22111001199929. The next prime is 22111001200033. The reversal of 22111001200021 is 12000210011122.

It is not a de Polignac number, because 22111001200021 - 2¹⁹ = 22111000675733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111001199974 and 22111001200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111001200121) 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, 3443350 + ... + 7488568.

It is an arithmetic number, because the mean of its divisors is an integer number (1494579342960).

Almost surely, 2^{22111001200021} is an apocalyptic number.

It is an amenable number.

22111001200021 is a deficient number, since it is larger than the sum of its proper divisors (1802268287339).

22111001200021 is a wasteful number, since it uses less digits than its factorization.

22111001200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052124.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22111001200021 its reverse (12000210011122), we get a palindrome (34111211211143).

The spelling of 22111001200021 in words is "twenty-two trillion, one hundred eleven billion, one million, two hundred thousand, twenty-one".