22112020001988 has 36 divisors (see below), whose sum is σ = 63879168895360. Its totient is φ = 6317720000496.

The previous prime is 22112020001987. The next prime is 22112020001989. The reversal of 22112020001988 is 88910002021122.

It is an interprime number because it is at equal distance from previous prime (22112020001987) and next prime (22112020001989).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22112020001987) 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, 43873055308 + ... + 43873055811.

Almost surely, 2^{22112020001988} is an apocalyptic number.

22112020001988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22112020001988 is an abundant number, since it is smaller than the sum of its proper divisors (41767148893372).

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

22112020001988 is a wasteful number, since it uses less digits than its factorization.

22112020001988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87746111136 (or 87746111131 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 22112020001988 in words is "twenty-two trillion, one hundred twelve billion, twenty million, one thousand, nine hundred eighty-eight".