110721897001 has 3 divisors (see below), whose sum is σ = 110722229751. Its totient is φ = 110721564252.

The previous prime is 110721896947. The next prime is 110721897019. The reversal of 110721897001 is 100798127011.

The square root of 110721897001 is 332749.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 82799487001 + 27922410000 = 287749^2 + 167100^2 .

It is not a de Polignac number, because 110721897001 - 2¹⁵ = 110721864233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (110721897071) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 166375 + ... + 499123.

It is an arithmetic number, because the mean of its divisors is an integer number (36907409917).

Almost surely, 2^110721897001 is an apocalyptic number.

110721897001 is the 332749-th square number.

110721897001 is the 166375-th centered octagonal number.

It is an amenable number.

110721897001 is a deficient number, since it is larger than the sum of its proper divisors (332750).

110721897001 is an frugal number, since it uses more digits than its factorization.

110721897001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665498 (or 332749 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 37.

Multiplying 110721897001 by its product of nonzero digits (7056), we get a square (781253705239056 = 27950916²).

The spelling of 110721897001 in words is "one hundred ten billion, seven hundred twenty-one million, eight hundred ninety-seven thousand, one".