22021202102021 has 4 divisors (see below), whose sum is σ = 22112576384844. Its totient is φ = 21929827819200.

The previous prime is 22021202101963. The next prime is 22021202102033. The reversal of 22021202102021 is 12020120212022.

It is a happy number.

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 8486087521921 + 13535114580100 = 2913089^2 + 3679010^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021202102021 - 2⁶ = 22021202101957 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 (22021202102621) 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, 45687141050 + ... + 45687141531.

It is an arithmetic number, because the mean of its divisors is an integer number (5528144096211).

Almost surely, 2^{22021202102021} is an apocalyptic number.

It is an amenable number.

22021202102021 is a deficient number, since it is larger than the sum of its proper divisors (91374282823).

22021202102021 is an equidigital number, since it uses as much as digits as its factorization.

22021202102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91374282822.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22021202102021 its reverse (12020120212022), we get a palindrome (34041322314043).

The spelling of 22021202102021 in words is "twenty-two trillion, twenty-one billion, two hundred two million, one hundred two thousand, twenty-one".