5701121721 has 24 divisors (see below), whose sum is σ = 8343209160. Its totient is φ = 3751059456.

The previous prime is 5701121669. The next prime is 5701121729. The reversal of 5701121721 is 1271211075.

5701121721 is a `hidden beast` number, since 570 + 1 + 1 + 21 + 72 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2887880121 + 2813241600 = 53739^2 + 53040^2 .

It is not a de Polignac number, because 5701121721 - 2¹³ = 5701113529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5701121729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240811 + ... + 263423.

It is an arithmetic number, because the mean of its divisors is an integer number (347633715).

Almost surely, 2^5701121721 is an apocalyptic number.

It is an amenable number.

5701121721 is a deficient number, since it is larger than the sum of its proper divisors (2642087439).

5701121721 is a wasteful number, since it uses less digits than its factorization.

5701121721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22985 (or 22982 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 27.

The square root of 5701121721 is about 75505.7727660607. The cubic root of 5701121721 is about 1786.4331582770.

Adding to 5701121721 its reverse (1271211075), we get a palindrome (6972332796).

The spelling of 5701121721 in words is "five billion, seven hundred one million, one hundred twenty-one thousand, seven hundred twenty-one".