221422115125632 has 128 divisors (see below), whose sum is σ = 622815123974400. Its totient is φ = 69504073574400.

The previous prime is 221422115125529. The next prime is 221422115125663. The reversal of 221422115125632 is 236521511224122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 89645119 + ... + 92081982.

It is an arithmetic number, because the mean of its divisors is an integer number (4865743156050).

Almost surely, 2^{221422115125632} is an apocalyptic number.

It is an amenable number.

221422115125632 is an abundant number, since it is smaller than the sum of its proper divisors (401393008848768).

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

221422115125632 is a wasteful number, since it uses less digits than its factorization.

221422115125632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181727304 (or 181727292 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

Adding to 221422115125632 its reverse (236521511224122), we get a palindrome (457943626349754).

The spelling of 221422115125632 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one hundred fifteen million, one hundred twenty-five thousand, six hundred thirty-two".