2971103768721 has 135 divisors (see below), whose sum is σ = 5106554656203. Its totient is φ = 1720103726880.

The previous prime is 2971103768719. The next prime is 2971103768753. The reversal of 2971103768721 is 1278673011792.

The square root of 2971103768721 is 1723689.

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

2971103768721 is a `hidden beast` number, since 2 + 97 + 110 + 376 + 8 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1835523684225 + 1135580084496 = 1354815^2 + 1065636^2 .

It is not a de Polignac number, because 2971103768721 - 2¹ = 2971103768719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2971103068721) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 3924839475 + ... + 3924840231.

Almost surely, 2^{2971103768721} is an apocalyptic number.

2971103768721 is the 1723689-th square number.

2971103768721 is the 861845-th centered octagonal number.

It is an amenable number.

2971103768721 is a deficient number, since it is larger than the sum of its proper divisors (2135450887482).

2971103768721 is an frugal number, since it uses more digits than its factorization.

2971103768721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 2971103768721 in words is "two trillion, nine hundred seventy-one billion, one hundred three million, seven hundred sixty-eight thousand, seven hundred twenty-one".