12000021011988 has 48 divisors (see below), whose sum is σ = 28275875712000. Its totient is φ = 3960640610784.

The previous prime is 12000021011983. The next prime is 12000021012011. The reversal of 12000021011988 is 88911012000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000021011983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229095 + ... + 4904337.

It is an arithmetic number, because the mean of its divisors is an integer number (589080744000).

Almost surely, 2^{12000021011988} is an apocalyptic number.

It is an amenable number.

12000021011988 is an abundant number, since it is smaller than the sum of its proper divisors (16275854700012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12000021011988 is a wasteful number, since it uses less digits than its factorization.

12000021011988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677356 (or 4677354 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 12000021011988 in words is "twelve trillion, twenty-one million, eleven thousand, nine hundred eighty-eight".