12209971144 has 32 divisors (see below), whose sum is σ = 26173252800. Its totient is φ = 5231039040.

The previous prime is 12209971139. The next prime is 12209971201. The reversal of 12209971144 is 44117990221.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12209971097 and 12209971106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132954 + ... + 205174.

It is an arithmetic number, because the mean of its divisors is an integer number (817914150).

Almost surely, 2^12209971144 is an apocalyptic number.

12209971144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12209971144 is an abundant number, since it is smaller than the sum of its proper divisors (13963281656).

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

12209971144 is a wasteful number, since it uses less digits than its factorization.

12209971144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75253 (or 75249 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 12209971144 in words is "twelve billion, two hundred nine million, nine hundred seventy-one thousand, one hundred forty-four".