223231204061721 has 12 divisors (see below), whose sum is σ = 325769248540372. Its totient is φ = 147286567627776.

The previous prime is 223231204061711. The next prime is 223231204061777. The reversal of 223231204061721 is 127160402132322.

223231204061721 is a `hidden beast` number, since 2 + 2 + 3 + 2 + 3 + 12 + 0 + 4 + 0 + 617 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77490414602496 + 145740789459225 = 8802864^2 + 12072315^2 .

It is not a de Polignac number, because 223231204061721 - 2¹¹ = 223231204059673 is a prime.

It is a super-3 number, since 3×223231204061721³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223231204061711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127852922416 + ... + 127852924161.

Almost surely, 2^{223231204061721} is an apocalyptic number.

It is an amenable number.

223231204061721 is a deficient number, since it is larger than the sum of its proper divisors (102538044478651).

223231204061721 is a wasteful number, since it uses less digits than its factorization.

223231204061721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255705846680 (or 255705846677 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 223231204061721 in words is "two hundred twenty-three trillion, two hundred thirty-one billion, two hundred four million, sixty-one thousand, seven hundred twenty-one".