22221022211121 has 4 divisors (see below), whose sum is σ = 29628029614832. Its totient is φ = 14814014807412.

The previous prime is 22221022211117. The next prime is 22221022211123. The reversal of 22221022211121 is 12111222012222.

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 not a de Polignac number, because 22221022211121 - 2² = 22221022211117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221022211123) 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, 3703503701851 + ... + 3703503701856.

It is an arithmetic number, because the mean of its divisors is an integer number (7407007403708).

Almost surely, 2^{22221022211121} is an apocalyptic number.

It is an amenable number.

22221022211121 is a deficient number, since it is larger than the sum of its proper divisors (7407007403711).

22221022211121 is an equidigital number, since it uses as much as digits as its factorization.

22221022211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407007403710.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22221022211121 its reverse (12111222012222), we get a palindrome (34332244223343).

The spelling of 22221022211121 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-two million, two hundred eleven thousand, one hundred twenty-one".