22120102021 has 4 divisors (see below), whose sum is σ = 22120423200. Its totient is φ = 22119780844.

The previous prime is 22120102019. The next prime is 22120102027. The reversal of 22120102021 is 12020102122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22120102021 - 2¹ = 22120102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120101992 and 22120102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120102027) 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, 10561 + ... + 210598.

It is an arithmetic number, because the mean of its divisors is an integer number (5530105800).

Almost surely, 2^22120102021 is an apocalyptic number.

It is an amenable number.

22120102021 is a deficient number, since it is larger than the sum of its proper divisors (321179).

22120102021 is a wasteful number, since it uses less digits than its factorization.

22120102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321178.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22120102021 its reverse (12020102122), we get a palindrome (34140204143).

The spelling of 22120102021 in words is "twenty-two billion, one hundred twenty million, one hundred two thousand, twenty-one".