1273220223721 has 8 divisors (see below), whose sum is σ = 1277081337600. Its totient is φ = 1269364123440.

The previous prime is 1273220223701. The next prime is 1273220223733.

1273220223721 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 not a de Polignac number, because 1273220223721 - 2¹⁷ = 1273220092649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273220223701) 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, 744411 + ... + 1760848.

It is an arithmetic number, because the mean of its divisors is an integer number (159635167200).

Almost surely, 2^{1273220223721} is an apocalyptic number.

It is an amenable number.

1273220223721 is a deficient number, since it is larger than the sum of its proper divisors (3861113879).

1273220223721 is a wasteful number, since it uses less digits than its factorization.

1273220223721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506799.

The product of its (nonzero) digits is 28224, while the sum is 34.

It can be divided in two parts, 1273220 and 223721, that added together give a palindrome (1496941).

The spelling of 1273220223721 in words is "one trillion, two hundred seventy-three billion, two hundred twenty million, two hundred twenty-three thousand, seven hundred twenty-one".