22101112121 has 4 divisors (see below), whose sum is σ = 24110304144. Its totient is φ = 20091920100.

The previous prime is 22101112087. The next prime is 22101112129. The reversal of 22101112121 is 12121110122.

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 22101112121 - 2⁶ = 22101112057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22101112096 and 22101112105.

It is not an unprimeable number, because it can be changed into a prime (22101112129) 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, 1004595995 + ... + 1004596016.

It is an arithmetic number, because the mean of its divisors is an integer number (6027576036).

Almost surely, 2^22101112121 is an apocalyptic number.

It is an amenable number.

22101112121 is a deficient number, since it is larger than the sum of its proper divisors (2009192023).

22101112121 is a wasteful number, since it uses less digits than its factorization.

22101112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009192022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22101112121 its reverse (12121110122), we get a palindrome (34222222243).

The spelling of 22101112121 in words is "twenty-two billion, one hundred one million, one hundred twelve thousand, one hundred twenty-one".