221041166125 has 32 divisors (see below), whose sum is σ = 297600855552. Its totient is φ = 162943848000.

The previous prime is 221041166089. The next prime is 221041166147. The reversal of 221041166125 is 521661140122.

It is a happy number.

It is not a de Polignac number, because 221041166125 - 2²¹ = 221039068973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808764 + ... + 1046986.

It is an arithmetic number, because the mean of its divisors is an integer number (9300026736).

Almost surely, 2^221041166125 is an apocalyptic number.

221041166125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221041166125 is a deficient number, since it is larger than the sum of its proper divisors (76559689427).

221041166125 is a wasteful number, since it uses less digits than its factorization.

221041166125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238822 (or 238812 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 221041166125 in words is "two hundred twenty-one billion, forty-one million, one hundred sixty-six thousand, one hundred twenty-five".