12291440572 has 24 divisors (see below), whose sum is σ = 22894583040. Its totient is φ = 5753917440.

The previous prime is 12291440543. The next prime is 12291440659. The reversal of 12291440572 is 27504419221.

It is a super-2 number, since 2×12291440572² (a number of 21 digits) contains 22 as substring.

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, 460197 + ... + 486172.

It is an arithmetic number, because the mean of its divisors is an integer number (953940960).

Almost surely, 2^12291440572 is an apocalyptic number.

It is an amenable number.

12291440572 is a deficient number, since it is larger than the sum of its proper divisors (10603142468).

12291440572 is a wasteful number, since it uses less digits than its factorization.

12291440572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946581 (or 946579 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 12291440572 its reverse (27504419221), we get a palindrome (39795859793).

The spelling of 12291440572 in words is "twelve billion, two hundred ninety-one million, four hundred forty thousand, five hundred seventy-two".