5111711221 has 2 divisors, whose sum is σ = 5111711222. Its totient is φ = 5111711220.

The previous prime is 5111711167. The next prime is 5111711233. The reversal of 5111711221 is 1221171115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3494464996 + 1617246225 = 59114^2 + 40215^2 .

It is a cyclic number.

It is not a de Polignac number, because 5111711221 - 2⁷ = 5111711093 is a prime.

It is a super-2 number, since 2×5111711221² = 52259183213794621682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5111711192 and 5111711201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5111711821) 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 as a sum of consecutive naturals, namely, 2555855610 + 2555855611.

It is an arithmetic number, because the mean of its divisors is an integer number (2555855611).

Almost surely, 2^5111711221 is an apocalyptic number.

It is an amenable number.

5111711221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5111711221 is an equidigital number, since it uses as much as digits as its factorization.

5111711221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140, while the sum is 22.

The square root of 5111711221 is about 71496.2322154112. The cubic root of 5111711221 is about 1722.6171646152.

Adding to 5111711221 its reverse (1221171115), we get a palindrome (6332882336).

The spelling of 5111711221 in words is "five billion, one hundred eleven million, seven hundred eleven thousand, two hundred twenty-one".