22312231220 has 24 divisors (see below), whose sum is σ = 47224633344. Its totient is φ = 8854616736.

The previous prime is 22312231177. The next prime is 22312231237. The reversal of 22312231220 is 2213221322.

It is a happy number.

It is a super-3 number, since 3×22312231220³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22312231192 and 22312231201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4389632 + ... + 4394711.

It is an arithmetic number, because the mean of its divisors is an integer number (1967693056).

Almost surely, 2^22312231220 is an apocalyptic number.

22312231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22312231220 is an abundant number, since it is smaller than the sum of its proper divisors (24912402124).

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

22312231220 is a wasteful number, since it uses less digits than its factorization.

22312231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784479 (or 8784477 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22312231220 its reverse (2213221322), we get a palindrome (24525452542).

The spelling of 22312231220 in words is "twenty-two billion, three hundred twelve million, two hundred thirty-one thousand, two hundred twenty".