22120001988 has 72 divisors (see below), whose sum is σ = 60512965632. Its totient is φ = 6270215616.

The previous prime is 22120001977. The next prime is 22120001999. The reversal of 22120001988 is 88910002122.

It is an interprime number because it is at equal distance from previous prime (22120001977) and next prime (22120001999).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73431 + ... + 222782.

It is an arithmetic number, because the mean of its divisors is an integer number (840457856).

Almost surely, 2^22120001988 is an apocalyptic number.

22120001988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22120001988 is an abundant number, since it is smaller than the sum of its proper divisors (38392963644).

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

22120001988 is a wasteful number, since it uses less digits than its factorization.

22120001988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296361 (or 296352 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 22120001988 in words is "twenty-two billion, one hundred twenty million, one thousand, nine hundred eighty-eight".