221056332497 has 32 divisors (see below), whose sum is σ = 298624005120. Its totient is φ = 158025971520.

The previous prime is 221056332491. The next prime is 221056332517. The reversal of 221056332497 is 794233650122.

It is a cyclic number.

It is not a de Polignac number, because 221056332497 - 2³⁰ = 219982590673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221056332491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514247 + ... + 840572.

It is an arithmetic number, because the mean of its divisors is an integer number (9332000160).

Almost surely, 2^221056332497 is an apocalyptic number.

It is an amenable number.

221056332497 is a deficient number, since it is larger than the sum of its proper divisors (77567672623).

221056332497 is a wasteful number, since it uses less digits than its factorization.

221056332497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355013.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 221056332497 in words is "two hundred twenty-one billion, fifty-six million, three hundred thirty-two thousand, four hundred ninety-seven".