191220110112 has 48 divisors (see below), whose sum is σ = 501977371392. Its totient is φ = 63736915200.

The previous prime is 191220110101. The next prime is 191220110143. The reversal of 191220110112 is 211011022191.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×191220110112² (a number of 23 digits) contains 22 as substring.

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, 2759473 + ... + 2827919.

It is an arithmetic number, because the mean of its divisors is an integer number (10457861904).

Almost surely, 2^191220110112 is an apocalyptic number.

191220110112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191220110112 is an abundant number, since it is smaller than the sum of its proper divisors (310757261280).

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

191220110112 is a wasteful number, since it uses less digits than its factorization.

191220110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97561 (or 97553 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 191220110112 in words is "one hundred ninety-one billion, two hundred twenty million, one hundred ten thousand, one hundred twelve".