721322120311 has 8 divisors (see below), whose sum is σ = 779674892864. Its totient is φ = 663378841440.

The previous prime is 721322120219. The next prime is 721322120339. The reversal of 721322120311 is 113021223127.

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 721322120311 - 2¹⁷ = 721321989239 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 (721322120011) 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, 102369756 + ... + 102376801.

It is an arithmetic number, because the mean of its divisors is an integer number (97459361608).

Almost surely, 2^721322120311 is an apocalyptic number.

721322120311 is a deficient number, since it is larger than the sum of its proper divisors (58352772553).

721322120311 is a wasteful number, since it uses less digits than its factorization.

721322120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204746841.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 721322120311 its reverse (113021223127), we get a palindrome (834343343438).

The spelling of 721322120311 in words is "seven hundred twenty-one billion, three hundred twenty-two million, one hundred twenty thousand, three hundred eleven".