12221140194 has 48 divisors (see below), whose sum is σ = 27581063328. Its totient is φ = 4055730912.

The previous prime is 12221140177. The next prime is 12221140201. The reversal of 12221140194 is 49104112221.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54934 + ... + 165710.

It is an arithmetic number, because the mean of its divisors is an integer number (574605486).

Almost surely, 2^12221140194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221140194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13790531664).

12221140194 is an abundant number, since it is smaller than the sum of its proper divisors (15359923134).

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

12221140194 is a wasteful number, since it uses less digits than its factorization.

12221140194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111021 (or 111009 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 12221140194 in words is "twelve billion, two hundred twenty-one million, one hundred forty thousand, one hundred ninety-four".