12021201992 has 16 divisors (see below), whose sum is σ = 22691029500. Its totient is φ = 5970260800.

The previous prime is 12021201989. The next prime is 12021202069. The reversal of 12021201992 is 29910212021.

It can be written as a sum of positive squares in 2 ways, for example, as 10783991716 + 1237210276 = 103846^2 + 35174^2 .

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, 5041259 + ... + 5043642.

Almost surely, 2^12021201992 is an apocalyptic number.

It is an amenable number.

12021201992 is a deficient number, since it is larger than the sum of its proper divisors (10669827508).

12021201992 is a wasteful number, since it uses less digits than its factorization.

12021201992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10085056 (or 10085052 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 12021201992 in words is "twelve billion, twenty-one million, two hundred one thousand, nine hundred ninety-two".