1223602173221 has 8 divisors (see below), whose sum is σ = 1246711847544. Its totient is φ = 1200493344960.

The previous prime is 1223602173217. The next prime is 1223602173251. The reversal of 1223602173221 is 1223712063221.

It can be written as a sum of positive squares in 4 ways, for example, as 344956528900 + 878645644321 = 587330^2 + 937361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223602173221 - 2² = 1223602173217 is a prime.

It is a super-2 number, since 2×1223602173221² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223602173251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3232895 + ... + 3591491.

It is an arithmetic number, because the mean of its divisors is an integer number (155838980943).

Almost surely, 2^{1223602173221} is an apocalyptic number.

It is an amenable number.

1223602173221 is a deficient number, since it is larger than the sum of its proper divisors (23109674323).

1223602173221 is an equidigital number, since it uses as much as digits as its factorization.

1223602173221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423031.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 1223602173221 in words is "one trillion, two hundred twenty-three billion, six hundred two million, one hundred seventy-three thousand, two hundred twenty-one".