101021992 has 16 divisors (see below), whose sum is σ = 189674100. Its totient is φ = 50442240.

The previous prime is 101021981. The next prime is 101022059. The reversal of 101021992 is 299120101.

It can be written as a sum of positive squares in 2 ways, for example, as 85858756 + 15163236 = 9266^2 + 3894^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059 + ... + 14362.

Almost surely, 2^101021992 is an apocalyptic number.

It is an amenable number.

101021992 is a deficient number, since it is larger than the sum of its proper divisors (88652108).

101021992 is a wasteful number, since it uses less digits than its factorization.

101021992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17196 (or 17192 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 101021992 is about 10050.9697044614. The cubic root of 101021992 is about 465.7347493020.

The spelling of 101021992 in words is "one hundred one million, twenty-one thousand, nine hundred ninety-two".