101001221988 has 48 divisors (see below), whose sum is σ = 236985967680. Its totient is φ = 33479535744.

The previous prime is 101001221921. The next prime is 101001222013. The reversal of 101001221988 is 889122100101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520658 + ... + 1585686.

It is an arithmetic number, because the mean of its divisors is an integer number (4937207660).

Almost surely, 2^101001221988 is an apocalyptic number.

It is an amenable number.

101001221988 is an abundant number, since it is smaller than the sum of its proper divisors (135984745692).

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

101001221988 is a wasteful number, since it uses less digits than its factorization.

101001221988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65756 (or 65754 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 101001221988 in words is "one hundred one billion, one million, two hundred twenty-one thousand, nine hundred eighty-eight".