1223726273221 has 8 divisors (see below), whose sum is σ = 1288144176320. Its totient is φ = 1159309495872.

The previous prime is 1223726273129. The next prime is 1223726273279.

1223726273221 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223726273221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223726273291) 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, 2834536 + ... + 3237598.

It is an arithmetic number, because the mean of its divisors is an integer number (161018022040).

Almost surely, 2^{1223726273221} is an apocalyptic number.

It is an amenable number.

1223726273221 is a deficient number, since it is larger than the sum of its proper divisors (64417903099).

1223726273221 is a wasteful number, since it uses less digits than its factorization.

1223726273221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562875.

The product of its digits is 169344, while the sum is 40.

The spelling of 1223726273221 in words is "one trillion, two hundred twenty-three billion, seven hundred twenty-six million, two hundred seventy-three thousand, two hundred twenty-one".