22111220012021 has 16 divisors (see below), whose sum is σ = 26419078078464. Its totient is φ = 18093791170224.

The previous prime is 22111220011967. The next prime is 22111220012039. The reversal of 22111220012021 is 12021002211122.

It is a de Polignac number, because none of the positive numbers 2^k-22111220012021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111220012221) 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, 131212901 + ... + 131381306.

It is an arithmetic number, because the mean of its divisors is an integer number (1651192379904).

Almost surely, 2^{22111220012021} is an apocalyptic number.

It is an amenable number.

22111220012021 is a deficient number, since it is larger than the sum of its proper divisors (4307858066443).

22111220012021 is a wasteful number, since it uses less digits than its factorization.

22111220012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262594760.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22111220012021 its reverse (12021002211122), we get a palindrome (34132222223143).

The spelling of 22111220012021 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, twenty-one".