22212210121 has 4 divisors (see below), whose sum is σ = 22238069200. Its totient is φ = 22186351044.

The previous prime is 22212210113. The next prime is 22212210131. The reversal of 22212210121 is 12101221222.

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 an emirpimes, since its reverse is a distinct semiprime: 12101221222 = 2 ⋅6050610611.

It is a cyclic number.

It is not a de Polignac number, because 22212210121 - 2³ = 22212210113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212210095 and 22212210104.

It is not an unprimeable number, because it can be changed into a prime (22212210131) 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, 12928251 + ... + 12929968.

It is an arithmetic number, because the mean of its divisors is an integer number (5559517300).

Almost surely, 2^22212210121 is an apocalyptic number.

It is an amenable number.

22212210121 is a deficient number, since it is larger than the sum of its proper divisors (25859079).

22212210121 is an equidigital number, since it uses as much as digits as its factorization.

22212210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25859078.

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

Adding to 22212210121 its reverse (12101221222), we get a palindrome (34313431343).

The spelling of 22212210121 in words is "twenty-two billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".