721712101105 has 8 divisors (see below), whose sum is σ = 869938175232. Its totient is φ = 574780578288.

The previous prime is 721712101031. The next prime is 721712101127. The reversal of 721712101105 is 501101217127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721712101105 - 2¹⁷ = 721711970033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323636599 + ... + 323638828.

It is an arithmetic number, because the mean of its divisors is an integer number (108742271904).

Almost surely, 2^721712101105 is an apocalyptic number.

It is an amenable number.

721712101105 is a deficient number, since it is larger than the sum of its proper divisors (148226074127).

721712101105 is a wasteful number, since it uses less digits than its factorization.

721712101105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647275655.

The product of its (nonzero) digits is 980, while the sum is 28.

The spelling of 721712101105 in words is "seven hundred twenty-one billion, seven hundred twelve million, one hundred one thousand, one hundred five".