721061001120 has 96 divisors (see below), whose sum is σ = 2273066167680. Its totient is φ = 192136985600.

The previous prime is 721061001047. The next prime is 721061001139. The reversal of 721061001120 is 21100160127.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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, 63670 + ... + 1202570.

It is an arithmetic number, because the mean of its divisors is an integer number (23677772580).

Almost surely, 2^721061001120 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 721061001120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136533083840).

721061001120 is an abundant number, since it is smaller than the sum of its proper divisors (1552005166560).

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

721061001120 is a wasteful number, since it uses less digits than its factorization.

721061001120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140238 (or 1140230 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

Adding to 721061001120 its reverse (21100160127), we get a palindrome (742161161247).

The spelling of 721061001120 in words is "seven hundred twenty-one billion, sixty-one million, one thousand, one hundred twenty".