12221220195 has 16 divisors (see below), whose sum is σ = 21726613920. Its totient is φ = 6517984032.

The previous prime is 12221220173. The next prime is 12221220229. The reversal of 12221220195 is 59102212221.

It is a happy number.

It is not a de Polignac number, because 12221220195 - 2⁵ = 12221220163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45263644 + ... + 45263913.

It is an arithmetic number, because the mean of its divisors is an integer number (1357913370).

Almost surely, 2^12221220195 is an apocalyptic number.

12221220195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12221220195 is a deficient number, since it is larger than the sum of its proper divisors (9505393725).

12221220195 is an equidigital number, since it uses as much as digits as its factorization.

12221220195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90527571 (or 90527565 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 12221220195 in words is "twelve billion, two hundred twenty-one million, two hundred twenty thousand, one hundred ninety-five".