22012002120 has 64 divisors (see below), whose sum is σ = 66324456000. Its totient is φ = 5844227328.

The previous prime is 22012002119. The next prime is 22012002157. The reversal of 22012002120 is 2120021022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22012002096 and 22012002105.

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 15 ways as a sum of consecutive naturals, for example, 373030 + ... + 427989.

It is an arithmetic number, because the mean of its divisors is an integer number (1036319625).

Almost surely, 2^22012002120 is an apocalyptic number.

22012002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012002120 is an abundant number, since it is smaller than the sum of its proper divisors (44312453880).

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

22012002120 is a wasteful number, since it uses less digits than its factorization.

22012002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801262 (or 801258 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22012002120 its reverse (2120021022), we get a palindrome (24132023142).

The spelling of 22012002120 in words is "twenty-two billion, twelve million, two thousand, one hundred twenty".