12227197940 has 96 divisors (see below), whose sum is σ = 27357861888. Its totient is φ = 4582656000.

The previous prime is 12227197849. The next prime is 12227197951. The reversal of 12227197940 is 4979172221.

It is a junction number, because it is equal to n+sod(n) for n = 12227197891 and 12227197900.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 3480785 + ... + 3484295.

It is an arithmetic number, because the mean of its divisors is an integer number (284977728).

Almost surely, 2^12227197940 is an apocalyptic number.

12227197940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12227197940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13678930944).

12227197940 is an abundant number, since it is smaller than the sum of its proper divisors (15130663948).

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

12227197940 is a wasteful number, since it uses less digits than its factorization.

12227197940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729 (or 3727 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 12227197940 in words is "twelve billion, two hundred twenty-seven million, one hundred ninety-seven thousand, nine hundred forty".