221223475201 has 4 divisors (see below), whose sum is σ = 221441860692. Its totient is φ = 221005089712.

The previous prime is 221223475199. The next prime is 221223475211. The reversal of 221223475201 is 102574322122.

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 67508510976 + 153714964225 = 259824^2 + 392065^2 .

It is a cyclic number.

It is not a de Polignac number, because 221223475201 - 2¹ = 221223475199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223475211) 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, 109191226 + ... + 109193251.

It is an arithmetic number, because the mean of its divisors is an integer number (55360465173).

Almost surely, 2^221223475201 is an apocalyptic number.

It is an amenable number.

221223475201 is a deficient number, since it is larger than the sum of its proper divisors (218385491).

221223475201 is a wasteful number, since it uses less digits than its factorization.

221223475201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218385490.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 221223475201 its reverse (102574322122), we get a palindrome (323797797323).

The spelling of 221223475201 in words is "two hundred twenty-one billion, two hundred twenty-three million, four hundred seventy-five thousand, two hundred one".