721206747122 has 32 divisors (see below), whose sum is σ = 1112860995840. Its totient is φ = 350389428480.

The previous prime is 721206747101. The next prime is 721206747137. The reversal of 721206747122 is 221747602127.

It is a self number, because there is not a number n which added to its sum of digits gives 721206747122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15440279 + ... + 15486917.

It is an arithmetic number, because the mean of its divisors is an integer number (34776906120).

Almost surely, 2^721206747122 is an apocalyptic number.

721206747122 is a deficient number, since it is larger than the sum of its proper divisors (391654248718).

721206747122 is a wasteful number, since it uses less digits than its factorization.

721206747122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48098.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 721206747122 in words is "seven hundred twenty-one billion, two hundred six million, seven hundred forty-seven thousand, one hundred twenty-two".