99109001901 has 32 divisors (see below), whose sum is σ = 167036117248. Its totient is φ = 50864371200.

The previous prime is 99109001891. The next prime is 99109001951. The reversal of 99109001901 is 10910090199.

It is not a de Polignac number, because 99109001901 - 2¹⁵ = 99108969133 is a prime.

It is a super-2 number, since 2×99109001901² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99109001901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99109001951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4895800 + ... + 4916001.

It is an arithmetic number, because the mean of its divisors is an integer number (5219878664).

Almost surely, 2^99109001901 is an apocalyptic number.

99109001901 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99109001901 is a deficient number, since it is larger than the sum of its proper divisors (67927115347).

99109001901 is a wasteful number, since it uses less digits than its factorization.

99109001901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9811861.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 99109001901 in words is "ninety-nine billion, one hundred nine million, one thousand, nine hundred one".