9901001111 has 8 divisors (see below), whose sum is σ = 9947259504. Its totient is φ = 9854775360.

The previous prime is 9901001087. The next prime is 9901001113. The reversal of 9901001111 is 1111001099.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9901001111 - 2²² = 9896806807 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 (9901001113) 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, 769745 + ... + 782501.

It is an arithmetic number, because the mean of its divisors is an integer number (1243407438).

Almost surely, 2^9901001111 is an apocalyptic number.

9901001111 is a deficient number, since it is larger than the sum of its proper divisors (46258393).

9901001111 is a wasteful number, since it uses less digits than its factorization.

9901001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 9901001111 is about 99503.7743555489. The cubic root of 9901001111 is about 2147.3015441801.

The spelling of 9901001111 in words is "nine billion, nine hundred one million, one thousand, one hundred eleven".