721110000101 has 4 divisors (see below), whose sum is σ = 723384795372. Its totient is φ = 718835204832.

The previous prime is 721109999999. The next prime is 721110000109. The reversal of 721110000101 is 101000011127.

721110000101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107079472900 + 614030527201 = 327230^2 + 783601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721110000101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721110000109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137397160 + ... + 1137397793.

It is an arithmetic number, because the mean of its divisors is an integer number (180846198843).

Almost surely, 2^721110000101 is an apocalyptic number.

It is an amenable number.

721110000101 is a deficient number, since it is larger than the sum of its proper divisors (2274795271).

721110000101 is a wasteful number, since it uses less digits than its factorization.

721110000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274795270.

The product of its (nonzero) digits is 14, while the sum is 14.

Adding to 721110000101 its reverse (101000011127), we get a palindrome (822110011228).

The spelling of 721110000101 in words is "seven hundred twenty-one billion, one hundred ten million, one hundred one", and thus it is an aban number.