12212621192 has 16 divisors (see below), whose sum is σ = 22921374300. Its totient is φ = 6100254720.

The previous prime is 12212621149. The next prime is 12212621227. The reversal of 12212621192 is 29112621221.

It can be written as a sum of positive squares in 2 ways, for example, as 10517322916 + 1695298276 = 102554^2 + 41174^2 .

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, 748409 + ... + 764552.

Almost surely, 2^12212621192 is an apocalyptic number.

It is an amenable number.

12212621192 is a deficient number, since it is larger than the sum of its proper divisors (10708753108).

12212621192 is a wasteful number, since it uses less digits than its factorization.

12212621192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513976 (or 1513972 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

Adding to 12212621192 its sum of digits (29), we get a palindrome (12212621221).

The spelling of 12212621192 in words is "twelve billion, two hundred twelve million, six hundred twenty-one thousand, one hundred ninety-two".