22222123420 has 48 divisors (see below), whose sum is σ = 53932374720. Its totient is φ = 7533402624.

The previous prime is 22222123411. The next prime is 22222123457. The reversal of 22222123420 is 2432122222.

It is a junction number, because it is equal to n+sod(n) for n = 22222123391 and 22222123400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879279 + ... + 904198.

It is an arithmetic number, because the mean of its divisors is an integer number (1123591140).

Almost surely, 2^22222123420 is an apocalyptic number.

22222123420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222123420 is an abundant number, since it is smaller than the sum of its proper divisors (31710251300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22222123420 is a wasteful number, since it uses less digits than its factorization.

22222123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783582 (or 1783580 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 22222123420 its reverse (2432122222), we get a palindrome (24654245642).

The spelling of 22222123420 in words is "twenty-two billion, two hundred twenty-two million, one hundred twenty-three thousand, four hundred twenty".