221929545601 has 16 divisors (see below), whose sum is σ = 242302523904. Its totient is φ = 202464680704.

The previous prime is 221929545577. The next prime is 221929545613. The reversal of 221929545601 is 106545929122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221929545601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221929585601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1409041 + ... + 1558606.

It is an arithmetic number, because the mean of its divisors is an integer number (15143907744).

Almost surely, 2^221929545601 is an apocalyptic number.

It is an amenable number.

221929545601 is a deficient number, since it is larger than the sum of its proper divisors (20372978303).

221929545601 is a wasteful number, since it uses less digits than its factorization.

221929545601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967800.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 221929545601 in words is "two hundred twenty-one billion, nine hundred twenty-nine million, five hundred forty-five thousand, six hundred one".