22221002011021 has 4 divisors (see below), whose sum is σ = 24241093102944. Its totient is φ = 20200910919100.

The previous prime is 22221002011007. The next prime is 22221002011049. The reversal of 22221002011021 is 12011020012222.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-22221002011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221002010986 and 22221002011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221002011121) 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, 1010045545945 + ... + 1010045545966.

It is an arithmetic number, because the mean of its divisors is an integer number (6060273275736).

Almost surely, 2^{22221002011021} is an apocalyptic number.

It is an amenable number.

22221002011021 is a deficient number, since it is larger than the sum of its proper divisors (2020091091923).

22221002011021 is a wasteful number, since it uses less digits than its factorization.

22221002011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020091091922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221002011021 its reverse (12011020012222), we get a palindrome (34232022023243).

The spelling of 22221002011021 in words is "twenty-two trillion, two hundred twenty-one billion, two million, eleven thousand, twenty-one".