12221639190 has 24 divisors (see below), whose sum is σ = 31776262128. Its totient is φ = 3259103760.

The previous prime is 12221639179. The next prime is 12221639231. The reversal of 12221639190 is 9193612221.

12221639190 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 1 + 639 + 19 + 0 = 666.

It is a super-2 number, since 2×12221639190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67897906 + ... + 67898085.

It is an arithmetic number, because the mean of its divisors is an integer number (1324010922).

Almost surely, 2^12221639190 is an apocalyptic number.

12221639190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221639190 is an abundant number, since it is smaller than the sum of its proper divisors (19554622938).

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

12221639190 is a wasteful number, since it uses less digits than its factorization.

12221639190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135796004 (or 135796001 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 12221639190 in words is "twelve billion, two hundred twenty-one million, six hundred thirty-nine thousand, one hundred ninety".