12021999942 has 16 divisors (see below), whose sum is σ = 24603163200. Its totient is φ = 3914139432.

The previous prime is 12021999937. The next prime is 12021999943. The reversal of 12021999942 is 24999912021.

It is a junction number, because it is equal to n+sod(n) for n = 12021999891 and 12021999900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021999943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23298192 + ... + 23298707.

It is an arithmetic number, because the mean of its divisors is an integer number (1537697700).

Almost surely, 2^12021999942 is an apocalyptic number.

12021999942 is an abundant number, since it is smaller than the sum of its proper divisors (12581163258).

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

12021999942 is a wasteful number, since it uses less digits than its factorization.

12021999942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46596947.

The product of its (nonzero) digits is 209952, while the sum is 48.

The spelling of 12021999942 in words is "twelve billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred forty-two".