720001122100 has 288 divisors, whose sum is σ = 1837163664000. Its totient is φ = 242514155520.

The previous prime is 720001122089. The next prime is 720001122101. The reversal of 720001122100 is 1221100027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720001122101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 317319766 + ... + 317322034.

It is an arithmetic number, because the mean of its divisors is an integer number (6379040500).

Almost surely, 2^720001122100 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 720001122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918581832000).

720001122100 is an abundant number, since it is smaller than the sum of its proper divisors (1117162541900).

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

720001122100 is a wasteful number, since it uses less digits than its factorization.

720001122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 720001122100 its reverse (1221100027), we get a palindrome (721222222127).

The spelling of 720001122100 in words is "seven hundred twenty billion, one million, one hundred twenty-two thousand, one hundred".