101998881 has 24 divisors (see below), whose sum is σ = 151351200. Its totient is φ = 66157056.

The previous prime is 101998873. The next prime is 101998889. The reversal of 101998881 is 188899101.

It is an interprime number because it is at equal distance from previous prime (101998873) and next prime (101998889).

It is not a de Polignac number, because 101998881 - 2³ = 101998873 is a prime.

It is a super-4 number, since 4×101998881⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (101998889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173470 + ... + 174056.

It is an arithmetic number, because the mean of its divisors is an integer number (6306300).

Almost surely, 2^101998881 is an apocalyptic number.

It is an amenable number.

101998881 is a deficient number, since it is larger than the sum of its proper divisors (49352319).

101998881 is a wasteful number, since it uses less digits than its factorization.

101998881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The square root of 101998881 is about 10099.4495394551. The cubic root of 101998881 is about 467.2311642228.

The spelling of 101998881 in words is "one hundred one million, nine hundred ninety-eight thousand, eight hundred eighty-one".