221607712734641 has 4 divisors (see below), whose sum is σ = 233271276562800. Its totient is φ = 209944148906484.

The previous prime is 221607712734523. The next prime is 221607712734647. The reversal of 221607712734641 is 146437217706122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221607712734641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221607712734647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5831781914051 + ... + 5831781914088.

It is an arithmetic number, because the mean of its divisors is an integer number (58317819140700).

Almost surely, 2^{221607712734641} is an apocalyptic number.

It is an amenable number.

221607712734641 is a deficient number, since it is larger than the sum of its proper divisors (11663563828159).

221607712734641 is a wasteful number, since it uses less digits than its factorization.

221607712734641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11663563828158.

The product of its (nonzero) digits is 4741632, while the sum is 53.

The spelling of 221607712734641 in words is "two hundred twenty-one trillion, six hundred seven billion, seven hundred twelve million, seven hundred thirty-four thousand, six hundred forty-one".