221411750750661 has 8 divisors (see below), whose sum is σ = 295349673880480. Its totient is φ = 147540830727312.

The previous prime is 221411750750657. The next prime is 221411750750689. The reversal of 221411750750661 is 166057057114122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221411750750661 - 2² = 221411750750657 is a prime.

It is a super-3 number, since 3×221411750750661³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221411750750661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221411750750161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16750768906 + ... + 16750782123.

It is an arithmetic number, because the mean of its divisors is an integer number (36918709235060).

Almost surely, 2^{221411750750661} is an apocalyptic number.

It is an amenable number.

221411750750661 is a deficient number, since it is larger than the sum of its proper divisors (73937923129819).

221411750750661 is a wasteful number, since it uses less digits than its factorization.

221411750750661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33501553235.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 221411750750661 in words is "two hundred twenty-one trillion, four hundred eleven billion, seven hundred fifty million, seven hundred fifty thousand, six hundred sixty-one".