22201021211021 has 4 divisors (see below), whose sum is σ = 22296304564092. Its totient is φ = 22105737857952.

The previous prime is 22201021211003. The next prime is 22201021211027. The reversal of 22201021211021 is 12011212010222.

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 10068652456996 + 12132368754025 = 3173114^2 + 3483155^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201021211021 - 2¹⁴ = 22201021194637 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 (22201021211027) 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, 47641676186 + ... + 47641676651.

It is an arithmetic number, because the mean of its divisors is an integer number (5574076141023).

Almost surely, 2^{22201021211021} is an apocalyptic number.

It is an amenable number.

22201021211021 is a deficient number, since it is larger than the sum of its proper divisors (95283353071).

22201021211021 is an equidigital number, since it uses as much as digits as its factorization.

22201021211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95283353070.

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

Adding to 22201021211021 its reverse (12011212010222), we get a palindrome (34212233221243).

The spelling of 22201021211021 in words is "twenty-two trillion, two hundred one billion, twenty-one million, two hundred eleven thousand, twenty-one".