22101121211021 has 4 divisors (see below), whose sum is σ = 22615100774112. Its totient is φ = 21587141647932.

The previous prime is 22101121210951. The next prime is 22101121211033. The reversal of 22101121211021 is 12011212110122.

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 22101121211021 - 2¹⁴ = 22101121194637 is a prime.

It is a super-2 number, since 2×22101121211021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101121211051) 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, 256989781481 + ... + 256989781566.

It is an arithmetic number, because the mean of its divisors is an integer number (5653775193528).

Almost surely, 2^{22101121211021} is an apocalyptic number.

It is an amenable number.

22101121211021 is a deficient number, since it is larger than the sum of its proper divisors (513979563091).

22101121211021 is an equidigital number, since it uses as much as digits as its factorization.

22101121211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513979563090.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22101121211021 its reverse (12011212110122), we get a palindrome (34112333321143).

The spelling of 22101121211021 in words is "twenty-two trillion, one hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty-one".