12091209212 has 24 divisors (see below), whose sum is σ = 21215789952. Its totient is φ = 6029578800.

The previous prime is 12091209167. The next prime is 12091209233. The reversal of 12091209212 is 21290219021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2847563 + ... + 2851805.

It is an arithmetic number, because the mean of its divisors is an integer number (883991248).

Almost surely, 2^12091209212 is an apocalyptic number.

It is an amenable number.

12091209212 is a deficient number, since it is larger than the sum of its proper divisors (9124580740).

12091209212 is a wasteful number, since it uses less digits than its factorization.

12091209212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969 (or 5967 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 12091209212 in words is "twelve billion, ninety-one million, two hundred nine thousand, two hundred twelve".