1000091081172 has 12 divisors (see below), whose sum is σ = 2333545856096. Its totient is φ = 333363693720.

The previous prime is 1000091081147. The next prime is 1000091081219. The reversal of 1000091081172 is 2711801900001.

1000091081172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41670461704 + ... + 41670461727.

Almost surely, 2^{1000091081172} is an apocalyptic number.

1000091081172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000091081172 is an abundant number, since it is smaller than the sum of its proper divisors (1333454774924).

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

1000091081172 is a wasteful number, since it uses less digits than its factorization.

1000091081172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83340923438 (or 83340923436 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 30.

Adding to 1000091081172 its reverse (2711801900001), we get a palindrome (3711892981173).

The spelling of 1000091081172 in words is "one trillion, ninety-one million, eighty-one thousand, one hundred seventy-two".