12121711564 has 6 divisors (see below), whose sum is σ = 21212995244. Its totient is φ = 6060855780.

The previous prime is 12121711499. The next prime is 12121711619. The reversal of 12121711564 is 46511712121.

It is a happy number.

It is a super-2 number, since 2×12121711564² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515213942 + ... + 1515213949.

Almost surely, 2^12121711564 is an apocalyptic number.

It is an amenable number.

12121711564 is a deficient number, since it is larger than the sum of its proper divisors (9091283680).

12121711564 is a wasteful number, since it uses less digits than its factorization.

12121711564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030427895 (or 3030427893 counting only the distinct ones).

The product of its digits is 3360, while the sum is 31.

The spelling of 12121711564 in words is "twelve billion, one hundred twenty-one million, seven hundred eleven thousand, five hundred sixty-four".