221421251731174 has 16 divisors (see below), whose sum is σ = 362327659572816. Its totient is φ = 100645474924800.

The previous prime is 221421251731171. The next prime is 221421251731193. The reversal of 221421251731174 is 471137152124122.

221421251731174 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221421251731174.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421251731171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23287647 + ... + 31387210.

It is an arithmetic number, because the mean of its divisors is an integer number (22645478723301).

Almost surely, 2^{221421251731174} is an apocalyptic number.

221421251731174 is a deficient number, since it is larger than the sum of its proper divisors (140906407841642).

221421251731174 is a wasteful number, since it uses less digits than its factorization.

221421251731174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54858951.

The product of its digits is 188160, while the sum is 43.

The spelling of 221421251731174 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-one million, seven hundred thirty-one thousand, one hundred seventy-four".