22021211200021 has 16 divisors (see below), whose sum is σ = 24107944992768. Its totient is φ = 19948707506800.

The previous prime is 22021211200013. The next prime is 22021211200031. The reversal of 22021211200021 is 12000211212022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22021211200021 - 2³ = 22021211200013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021211199968 and 22021211200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021211200031) 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, 2200890 + ... + 6991876.

It is an arithmetic number, because the mean of its divisors is an integer number (1506746562048).

Almost surely, 2^{22021211200021} is an apocalyptic number.

It is an amenable number.

22021211200021 is a deficient number, since it is larger than the sum of its proper divisors (2086733792747).

22021211200021 is a wasteful number, since it uses less digits than its factorization.

22021211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792472.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021211200021 its reverse (12000211212022), we get a palindrome (34021422412043).

The spelling of 22021211200021 in words is "twenty-two trillion, twenty-one billion, two hundred eleven million, two hundred thousand, twenty-one".