99999999901 has 8 divisors (see below), whose sum is σ = 100236943800. Its totient is φ = 99763120128.

The previous prime is 99999999871. The next prime is 99999999907. The reversal of 99999999901 is 10999999999.

It can be written as a sum of positive squares in 4 ways, for example, as 5314555801 + 94685444100 = 72901^2 + 307710^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999999901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999999907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4747545 + ... + 4768561.

It is an arithmetic number, because the mean of its divisors is an integer number (12529617975).

Almost surely, 2^99999999901 is an apocalyptic number.

It is an amenable number.

99999999901 is a deficient number, since it is larger than the sum of its proper divisors (236943899).

99999999901 is a wasteful number, since it uses less digits than its factorization.

99999999901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32063.

The product of its (nonzero) digits is 387420489, while the sum is 82.

It can be divided in two parts, 9999999 and 9901, that multiplied together give a palindrome (99009990099).

The spelling of 99999999901 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred one".