1091199021012 has 60 divisors (see below), whose sum is σ = 2852887218720. Its totient is φ = 363697632144.

The previous prime is 1091199020993. The next prime is 1091199021023. The reversal of 1091199021012 is 2101209911901.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3284689 + ... + 3601607.

It is an arithmetic number, because the mean of its divisors is an integer number (47548120312).

Almost surely, 2^{1091199021012} is an apocalyptic number.

1091199021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091199021012 is an abundant number, since it is smaller than the sum of its proper divisors (1761688197708).

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

1091199021012 is a wasteful number, since it uses less digits than its factorization.

1091199021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327562 (or 327551 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 1091199021012 in words is "one trillion, ninety-one billion, one hundred ninety-nine million, twenty-one thousand, twelve".