22122220022121 has 4 divisors (see below), whose sum is σ = 29496293362832. Its totient is φ = 14748146681412.

The previous prime is 22122220022113. The next prime is 22122220022171. The reversal of 22122220022121 is 12122002222122.

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 22122220022121 - 2³ = 22122220022113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22122220022171) 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, 3687036670351 + ... + 3687036670356.

It is an arithmetic number, because the mean of its divisors is an integer number (7374073340708).

Almost surely, 2^{22122220022121} is an apocalyptic number.

It is an amenable number.

22122220022121 is a deficient number, since it is larger than the sum of its proper divisors (7374073340711).

22122220022121 is an equidigital number, since it uses as much as digits as its factorization.

22122220022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374073340710.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22122220022121 its reverse (12122002222122), we get a palindrome (34244222244243).

The spelling of 22122220022121 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty million, twenty-two thousand, one hundred twenty-one".