991101211200012 has 48 divisors (see below), whose sum is σ = 2524203862717824. Its totient is φ = 300166940880000.

The previous prime is 991101211199963. The next prime is 991101211200029. The reversal of 991101211200012 is 210002112101199.

It is a super-2 number, since 2×991101211200012² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084254914 + ... + 2084730377.

It is an arithmetic number, because the mean of its divisors is an integer number (52587580473288).

Almost surely, 2^{991101211200012} is an apocalyptic number.

It is an amenable number.

991101211200012 is an abundant number, since it is smaller than the sum of its proper divisors (1533102651517812).

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

991101211200012 is a wasteful number, since it uses less digits than its factorization.

991101211200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168987110 (or 4168987108 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 991101211200012 in words is "nine hundred ninety-one trillion, one hundred one billion, two hundred eleven million, two hundred thousand, twelve".