721122099200 has 324 divisors, whose sum is σ = 1855996032870. Its totient is φ = 277925068800.

The previous prime is 721122099193. The next prime is 721122099251. The reversal of 721122099200 is 2990221127.

It can be written as a sum of positive squares in 3 ways, for example, as 668155838464 + 52966260736 = 817408^2 + 230144^2 .

It is a super-2 number, since 2×721122099200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3149004686 + ... + 3149004914.

Almost surely, 2^721122099200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721122099200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927998016435).

721122099200 is an abundant number, since it is smaller than the sum of its proper divisors (1134873933670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721122099200 is an frugal number, since it uses more digits than its factorization.

721122099200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 721122099200 in words is "seven hundred twenty-one billion, one hundred twenty-two million, ninety-nine thousand, two hundred".