11281921372 has 12 divisors (see below), whose sum is σ = 19778812200. Its totient is φ = 5630832176.

The previous prime is 11281921369. The next prime is 11281921379. The reversal of 11281921372 is 27312918211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281921379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2529622 + ... + 2534077.

It is an arithmetic number, because the mean of its divisors is an integer number (1648234350).

Almost surely, 2^11281921372 is an apocalyptic number.

It is an amenable number.

11281921372 is a deficient number, since it is larger than the sum of its proper divisors (8496890828).

11281921372 is a wasteful number, since it uses less digits than its factorization.

11281921372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064260 (or 5064258 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The spelling of 11281921372 in words is "eleven billion, two hundred eighty-one million, nine hundred twenty-one thousand, three hundred seventy-two".