11721774212 has 24 divisors (see below), whose sum is σ = 21119078400. Its totient is φ = 5689189440.

The previous prime is 11721774209. The next prime is 11721774313. The reversal of 11721774212 is 21247712711.

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, 146948 + ... + 212219.

It is an arithmetic number, because the mean of its divisors is an integer number (879961600).

Almost surely, 2^11721774212 is an apocalyptic number.

It is an amenable number.

11721774212 is a deficient number, since it is larger than the sum of its proper divisors (9397304188).

11721774212 is a wasteful number, since it uses less digits than its factorization.

11721774212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359411 (or 359409 counting only the distinct ones).

The product of its digits is 10976, while the sum is 35.

The spelling of 11721774212 in words is "eleven billion, seven hundred twenty-one million, seven hundred seventy-four thousand, two hundred twelve".