721341303143122 has 16 divisors (see below), whose sum is σ = 1130862121182360. Its totient is φ = 344643694069248.

The previous prime is 721341303143117. The next prime is 721341303143143. The reversal of 721341303143122 is 221341303143127.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 492024221461161 + 229317081681961 = 22181619^2 + 15143219^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64107824373 + ... + 64107835624.

Almost surely, 2^{721341303143122} is an apocalyptic number.

721341303143122 is a deficient number, since it is larger than the sum of its proper divisors (409520818039238).

721341303143122 is a wasteful number, since it uses less digits than its factorization.

721341303143122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128215660125.

The product of its (nonzero) digits is 72576, while the sum is 37.

Adding to 721341303143122 its reverse (221341303143127), we get a palindrome (942682606286249).

The spelling of 721341303143122 in words is "seven hundred twenty-one trillion, three hundred forty-one billion, three hundred three million, one hundred forty-three thousand, one hundred twenty-two".