99102081 has 24 divisors (see below), whose sum is σ = 150205440. Its totient is φ = 57767904.

The previous prime is 99102041. The next prime is 99102121. The reversal of 99102081 is 18020199.

99102081 is a nontrivial binomial coefficient, being equal to C(14079, 2).

It is an interprime number because it is at equal distance from previous prime (99102041) and next prime (99102121).

It is not a de Polignac number, because 99102081 - 2¹¹ = 99100033 is a prime.

It is a super-2 number, since 2×99102081² = 19642444917061122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99102001) 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, 10560 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (6258560).

Almost surely, 2^99102081 is an apocalyptic number.

99102081 is the 14078-th triangular number.

It is an amenable number.

99102081 is a deficient number, since it is larger than the sum of its proper divisors (51103359).

99102081 is a wasteful number, since it uses less digits than its factorization.

99102081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093 (or 7074 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 99102081 is about 9955.0028126566. The cubic root of 99102081 is about 462.7654474251.

The spelling of 99102081 in words is "ninety-nine million, one hundred two thousand, eighty-one".