99991130022 has 64 divisors (see below), whose sum is σ = 254890022400. Its totient is φ = 28462661280.

The previous prime is 99991129991. The next prime is 99991130023. The reversal of 99991130022 is 22003119999.

It is a self number, because there is not a number n which added to its sum of digits gives 99991130022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991130023) 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, 390004 + ... + 593367.

It is an arithmetic number, because the mean of its divisors is an integer number (3982656600).

Almost surely, 2^99991130022 is an apocalyptic number.

99991130022 is an abundant number, since it is smaller than the sum of its proper divisors (154898892378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99991130022 is a wasteful number, since it uses less digits than its factorization.

99991130022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983658 (or 983652 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 99991130022 in words is "ninety-nine billion, nine hundred ninety-one million, one hundred thirty thousand, twenty-two".