2091199110902 has 64 divisors (see below), whose sum is σ = 3781626683904. Its totient is φ = 855543575040.

The previous prime is 2091199110877. The next prime is 2091199110907. The reversal of 2091199110902 is 2090119911902.

It is a super-2 number, since 2×2091199110902² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091199110907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42615593 + ... + 42664635.

It is an arithmetic number, because the mean of its divisors is an integer number (59087916936).

Almost surely, 2^{2091199110902} is an apocalyptic number.

2091199110902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2091199110902 is a deficient number, since it is larger than the sum of its proper divisors (1690427573002).

2091199110902 is a wasteful number, since it uses less digits than its factorization.

2091199110902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54053.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 2091199110902 in words is "two trillion, ninety-one billion, one hundred ninety-nine million, one hundred ten thousand, nine hundred two".