39912222221992 has 16 divisors (see below), whose sum is σ = 74871069588000. Its totient is φ = 19946603665200.

The previous prime is 39912222221987. The next prime is 39912222222007. The reversal of 39912222221992 is 29912222221993.

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, 1188412884 + ... + 1188446467.

It is an arithmetic number, because the mean of its divisors is an integer number (4679441849250).

Almost surely, 2^{39912222221992} is an apocalyptic number.

It is an amenable number.

39912222221992 is a deficient number, since it is larger than the sum of its proper divisors (34958847366008).

39912222221992 is a wasteful number, since it uses less digits than its factorization.

39912222221992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376861456 (or 2376861452 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 55.

Subtracting from 39912222221992 its reverse (29912222221993), we obtain a palindrome (9999999999999).

The spelling of 39912222221992 in words is "thirty-nine trillion, nine hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-two".