22122020111021 has 4 divisors (see below), whose sum is σ = 22719912546492. Its totient is φ = 21524127675552.

The previous prime is 22122020110997. The next prime is 22122020111029. The reversal of 22122020111021 is 12011102022122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18193517728996 + 3928502382025 = 4265386^2 + 1982045^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122020111021 - 2³⁴ = 22104840241837 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 (22122020111029) 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, 298946217680 + ... + 298946217753.

It is an arithmetic number, because the mean of its divisors is an integer number (5679978136623).

Almost surely, 2^{22122020111021} is an apocalyptic number.

It is an amenable number.

22122020111021 is a deficient number, since it is larger than the sum of its proper divisors (597892435471).

22122020111021 is an equidigital number, since it uses as much as digits as its factorization.

22122020111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597892435470.

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

Adding to 22122020111021 its reverse (12011102022122), we get a palindrome (34133122133143).

The spelling of 22122020111021 in words is "twenty-two trillion, one hundred twenty-two billion, twenty million, one hundred eleven thousand, twenty-one".