721326120012 has 36 divisors (see below), whose sum is σ = 1930608146376. Its totient is φ = 226298390400.

The previous prime is 721326120001. The next prime is 721326120013. The reversal of 721326120012 is 210021623127.

721326120012 is a `hidden beast` number, since 7 + 2 + 1 + 32 + 612 + 0 + 0 + 12 = 666.

721326120012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×721326120012² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721326120013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589318114 + ... + 589319337.

It is an arithmetic number, because the mean of its divisors is an integer number (53628004066).

Almost surely, 2^721326120012 is an apocalyptic number.

It is an amenable number.

721326120012 is an abundant number, since it is smaller than the sum of its proper divisors (1209282026364).

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

721326120012 is a wasteful number, since it uses less digits than its factorization.

721326120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178637478 (or 1178637473 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 721326120012 its reverse (210021623127), we get a palindrome (931347743139).

The spelling of 721326120012 in words is "seven hundred twenty-one billion, three hundred twenty-six million, one hundred twenty thousand, twelve".