22220121221121 has 4 divisors (see below), whose sum is σ = 29626828294832. Its totient is φ = 14813414147412.

The previous prime is 22220121221101. The next prime is 22220121221143. The reversal of 22220121221121 is 12112212102222.

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 22220121221121 - 2¹⁸ = 22220120958977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220121221101) 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, 3703353536851 + ... + 3703353536856.

It is an arithmetic number, because the mean of its divisors is an integer number (7406707073708).

Almost surely, 2^{22220121221121} is an apocalyptic number.

It is an amenable number.

22220121221121 is a deficient number, since it is larger than the sum of its proper divisors (7406707073711).

22220121221121 is an equidigital number, since it uses as much as digits as its factorization.

22220121221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406707073710.

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

Adding to 22220121221121 its reverse (12112212102222), we get a palindrome (34332333323343).

The spelling of 22220121221121 in words is "twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".