991110022 has 16 divisors (see below), whose sum is σ = 1699502112. Its totient is φ = 424647360.

The previous prime is 991109989. The next prime is 991110037. The reversal of 991110022 is 220011199.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64168 + ... + 78100.

It is an arithmetic number, because the mean of its divisors is an integer number (106218882).

Almost surely, 2^991110022 is an apocalyptic number.

991110022 is a deficient number, since it is larger than the sum of its proper divisors (708392090).

991110022 is a wasteful number, since it uses less digits than its factorization.

991110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19023.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 991110022 is about 31481.8999109012. The cubic root of 991110022 is about 997.0278490705.

The spelling of 991110022 in words is "nine hundred ninety-one million, one hundred ten thousand, twenty-two".