721020313311322 has 16 divisors (see below), whose sum is σ = 1110796402145760. Its totient is φ = 350817180183792.

The previous prime is 721020313311293. The next prime is 721020313311371. The reversal of 721020313311322 is 223113313020127.

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, 15583540308 + ... + 15583586575.

It is an arithmetic number, because the mean of its divisors is an integer number (69424775134110).

Almost surely, 2^{721020313311322} is an apocalyptic number.

721020313311322 is a deficient number, since it is larger than the sum of its proper divisors (389776088834438).

721020313311322 is a wasteful number, since it uses less digits than its factorization.

721020313311322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31167127197.

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 721020313311322 its reverse (223113313020127), we get a palindrome (944133626331449).

The spelling of 721020313311322 in words is "seven hundred twenty-one trillion, twenty billion, three hundred thirteen million, three hundred eleven thousand, three hundred twenty-two".