22021100123 has 12 divisors (see below), whose sum is σ = 24795382584. Its totient is φ = 19530904800.

The previous prime is 22021100117. The next prime is 22021100173. The reversal of 22021100123 is 32100112022.

It is a happy number.

It is not a de Polignac number, because 22021100123 - 2³⁴ = 4841230939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021100098 and 22021100107.

It is not an unprimeable number, because it can be changed into a prime (22021100173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2214461 + ... + 2224382.

It is an arithmetic number, because the mean of its divisors is an integer number (2066281882).

Almost surely, 2^22021100123 is an apocalyptic number.

22021100123 is a deficient number, since it is larger than the sum of its proper divisors (2774282461).

22021100123 is a wasteful number, since it uses less digits than its factorization.

22021100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438906 (or 4438895 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22021100123 its reverse (32100112022), we get a palindrome (54121212145).

The spelling of 22021100123 in words is "twenty-two billion, twenty-one million, one hundred thousand, one hundred twenty-three".