22212001021 has 4 divisors (see below), whose sum is σ = 25385144032. Its totient is φ = 19038858012.

The previous prime is 22212000983. The next prime is 22212001033. The reversal of 22212001021 is 12010021222.

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 not a de Polignac number, because 22212001021 - 2⁹ = 22212000509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212000992 and 22212001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212031021) 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, 1586571495 + ... + 1586571508.

It is an arithmetic number, because the mean of its divisors is an integer number (6346286008).

Almost surely, 2^22212001021 is an apocalyptic number.

It is an amenable number.

22212001021 is a deficient number, since it is larger than the sum of its proper divisors (3173143011).

22212001021 is an equidigital number, since it uses as much as digits as its factorization.

22212001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173143010.

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

Adding to 22212001021 its reverse (12010021222), we get a palindrome (34222022243).

The spelling of 22212001021 in words is "twenty-two billion, two hundred twelve million, one thousand, twenty-one".