11972491100 has 36 divisors (see below), whose sum is σ = 25985055600. Its totient is φ = 4788120960.

The previous prime is 11972491087. The next prime is 11972491151. The reversal of 11972491100 is 119427911.

It is a super-3 number, since 3×11972491100³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1067321 + ... + 1078479.

It is an arithmetic number, because the mean of its divisors is an integer number (721807100).

Almost surely, 2^11972491100 is an apocalyptic number.

11972491100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11972491100 is an abundant number, since it is smaller than the sum of its proper divisors (14012564500).

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

11972491100 is a wasteful number, since it uses less digits than its factorization.

11972491100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21902 (or 21895 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 11972491100 in words is "eleven billion, nine hundred seventy-two million, four hundred ninety-one thousand, one hundred".