223089721721 has 4 divisors (see below), whose sum is σ = 223209599844. Its totient is φ = 222969843600.

The previous prime is 223089721697. The next prime is 223089721727. The reversal of 223089721721 is 127127980322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6153618025 + 216936103696 = 78445^2 + 465764^2 .

It is a cyclic number.

It is not a de Polignac number, because 223089721721 - 2¹⁸ = 223089459577 is a prime.

It is a super-3 number, since 3×223089721721³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223089721727) 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, 59936270 + ... + 59939991.

It is an arithmetic number, because the mean of its divisors is an integer number (55802399961).

Almost surely, 2^223089721721 is an apocalyptic number.

It is an amenable number.

223089721721 is a deficient number, since it is larger than the sum of its proper divisors (119878123).

223089721721 is a wasteful number, since it uses less digits than its factorization.

223089721721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119878122.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 223089721721 in words is "two hundred twenty-three billion, eighty-nine million, seven hundred twenty-one thousand, seven hundred twenty-one".