12010221993 has 72 divisors (see below), whose sum is σ = 21232392384. Its totient is φ = 5910252480.

The previous prime is 12010221983. The next prime is 12010222013. The reversal of 12010221993 is 39912201021.

It is not a de Polignac number, because 12010221993 - 2⁶ = 12010221929 is a prime.

It is a super-2 number, since 2×12010221993² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12010221993.

It is not an unprimeable number, because it can be changed into a prime (12010221943) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 910755 + ... + 923847.

Almost surely, 2^12010221993 is an apocalyptic number.

It is an amenable number.

12010221993 is a deficient number, since it is larger than the sum of its proper divisors (9222170391).

12010221993 is a wasteful number, since it uses less digits than its factorization.

12010221993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13163 (or 13133 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 12010221993 in words is "twelve billion, ten million, two hundred twenty-one thousand, nine hundred ninety-three".