12002021056 has 28 divisors (see below), whose sum is σ = 23820143368. Its totient is φ = 6000095232.

The previous prime is 12002021021. The next prime is 12002021077. The reversal of 12002021056 is 65012020021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642115 + ... + 660541.

It is an arithmetic number, because the mean of its divisors is an integer number (850719406).

Almost surely, 2^12002021056 is an apocalyptic number.

12002021056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12002021056 is a deficient number, since it is larger than the sum of its proper divisors (11818122312).

12002021056 is a wasteful number, since it uses less digits than its factorization.

12002021056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28616 (or 28606 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 12002021056 its reverse (65012020021), we get a palindrome (77014041077).

The spelling of 12002021056 in words is "twelve billion, two million, twenty-one thousand, fifty-six".