22222212120 has 48 divisors (see below), whose sum is σ = 72222190560. Its totient is φ = 5925923136.

The previous prime is 22222212119. The next prime is 22222212121. The reversal of 22222212120 is 2121222222.

It is an interprime number because it is at equal distance from previous prime (22222212119) and next prime (22222212121).

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 = 22222212093 and 22222212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222212121) 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, 30863824 + ... + 30864543.

It is an arithmetic number, because the mean of its divisors is an integer number (1504628970).

Almost surely, 2^22222212120 is an apocalyptic number.

22222212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222212120 is an abundant number, since it is smaller than the sum of its proper divisors (49999978440).

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

22222212120 is a wasteful number, since it uses less digits than its factorization.

22222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61728384 (or 61728377 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22222212120 its reverse (2121222222), we get a palindrome (24343434342).

The spelling of 22222212120 in words is "twenty-two billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".