1371347223721 has 4 divisors (see below), whose sum is σ = 1378238416000. Its totient is φ = 1364456031444.

The previous prime is 1371347223709. The next prime is 1371347223731. The reversal of 1371347223721 is 1273227431731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1371347223721 - 2⁵ = 1371347223689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371347223731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445595841 + ... + 3445596238.

It is an arithmetic number, because the mean of its divisors is an integer number (344559604000).

Almost surely, 2^{1371347223721} is an apocalyptic number.

It is an amenable number.

1371347223721 is a deficient number, since it is larger than the sum of its proper divisors (6891192279).

1371347223721 is an equidigital number, since it uses as much as digits as its factorization.

1371347223721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891192278.

The product of its digits is 296352, while the sum is 43.

The spelling of 1371347223721 in words is "one trillion, three hundred seventy-one billion, three hundred forty-seven million, two hundred twenty-three thousand, seven hundred twenty-one".