5211721106 has 16 divisors (see below), whose sum is σ = 7878303000. Its totient is φ = 2585657088.

The previous prime is 5211721057. The next prime is 5211721129. The reversal of 5211721106 is 6011271125.

It can be written as a sum of positive squares in 4 ways, for example, as 1571408881 + 3640312225 = 39641^2 + 60335^2 .

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, 292016 + ... + 309348.

Almost surely, 2^5211721106 is an apocalyptic number.

5211721106 is a deficient number, since it is larger than the sum of its proper divisors (2666581894).

5211721106 is a wasteful number, since it uses less digits than its factorization.

5211721106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 5211721106 is about 72192.2510107560. The cubic root of 5211721106 is about 1733.7789364788.

The spelling of 5211721106 in words is "five billion, two hundred eleven million, seven hundred twenty-one thousand, one hundred six".