22031223120 has 60 divisors (see below), whose sum is σ = 73988193396. Its totient is φ = 5874992640.

The previous prime is 22031223113. The next prime is 22031223157. The reversal of 22031223120 is 2132213022.

It can be written as a sum of positive squares in 2 ways, for example, as 7222280256 + 14808942864 = 84984^2 + 121692^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22031223093 and 22031223102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15298741 + ... + 15300180.

Almost surely, 2^22031223120 is an apocalyptic number.

22031223120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22031223120 is an abundant number, since it is smaller than the sum of its proper divisors (51956970276).

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

22031223120 is a wasteful number, since it uses less digits than its factorization.

22031223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30598940 (or 30598931 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22031223120 its reverse (2132213022), we get a palindrome (24163436142).

The spelling of 22031223120 in words is "twenty-two billion, thirty-one million, two hundred twenty-three thousand, one hundred twenty".