1222171185972 has 48 divisors (see below), whose sum is σ = 3116373043392. Its totient is φ = 369713018880.

The previous prime is 1222171185953. The next prime is 1222171186007. The reversal of 1222171185972 is 2795811712221.

It is a congruent number.

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, 7947123 + ... + 8099450.

It is an arithmetic number, because the mean of its divisors is an integer number (64924438404).

Almost surely, 2^{1222171185972} is an apocalyptic number.

1222171185972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222171185972 is an abundant number, since it is smaller than the sum of its proper divisors (1894201857420).

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

1222171185972 is a wasteful number, since it uses less digits than its factorization.

1222171185972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16047168 (or 16047166 counting only the distinct ones).

The product of its digits is 282240, while the sum is 48.

The spelling of 1222171185972 in words is "one trillion, two hundred twenty-two billion, one hundred seventy-one million, one hundred eighty-five thousand, nine hundred seventy-two".