22111220010021 has 4 divisors (see below), whose sum is σ = 29481626680032. Its totient is φ = 14740813340012.

The previous prime is 22111220010017. The next prime is 22111220010031. The reversal of 22111220010021 is 12001002211122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22111220010021 - 2² = 22111220010017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111220010031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685203335001 + ... + 3685203335006.

It is an arithmetic number, because the mean of its divisors is an integer number (7370406670008).

Almost surely, 2^{22111220010021} is an apocalyptic number.

It is an amenable number.

22111220010021 is a deficient number, since it is larger than the sum of its proper divisors (7370406670011).

22111220010021 is an equidigital number, since it uses as much as digits as its factorization.

22111220010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370406670010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22111220010021 its reverse (12001002211122), we get a palindrome (34112222221143).

The spelling of 22111220010021 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty million, ten thousand, twenty-one".