99991101031 has 8 divisors (see below), whose sum is σ = 101695403520. Its totient is φ = 98293030968.

The previous prime is 99991101011. The next prime is 99991101047. The reversal of 99991101031 is 13010119999.

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 99991101031 - 2⁵ = 99991100999 is a prime.

It is a super-2 number, since 2×99991101031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991101011) 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, 1525741 + ... + 1589926.

It is an arithmetic number, because the mean of its divisors is an integer number (12711925440).

Almost surely, 2^99991101031 is an apocalyptic number.

99991101031 is a deficient number, since it is larger than the sum of its proper divisors (1704302489).

99991101031 is a wasteful number, since it uses less digits than its factorization.

99991101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116213.

The product of its (nonzero) digits is 19683, while the sum is 43.

The spelling of 99991101031 in words is "ninety-nine billion, nine hundred ninety-one million, one hundred one thousand, thirty-one".