22111121211021 has 8 divisors (see below), whose sum is σ = 32757216608960. Its totient is φ = 14740747473996.

The previous prime is 22111121210923. The next prime is 22111121211029. The reversal of 22111121211021 is 12011212111122.

It is a happy number.

It is not a de Polignac number, because 22111121211021 - 2¹⁵ = 22111121178253 is a prime.

It is a super-2 number, since 2×22111121211021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111121210985 and 22111121211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111121211029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409465207585 + ... + 409465207638.

It is an arithmetic number, because the mean of its divisors is an integer number (4094652076120).

Almost surely, 2^{22111121211021} is an apocalyptic number.

It is an amenable number.

22111121211021 is a deficient number, since it is larger than the sum of its proper divisors (10646095397939).

22111121211021 is an equidigital number, since it uses as much as digits as its factorization.

22111121211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818930415232 (or 818930415226 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111121211021 its reverse (12011212111122), we get a palindrome (34122333322143).

The spelling of 22111121211021 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, twenty-one".