5221121687 has 2 divisors, whose sum is σ = 5221121688. Its totient is φ = 5221121686.

The previous prime is 5221121683. The next prime is 5221121707. The reversal of 5221121687 is 7861211225.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5221121687 - 2² = 5221121683 is a prime.

It is a super-2 number, since 2×5221121687² = 54520223340923451938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5221121683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610560843 + 2610560844.

It is an arithmetic number, because the mean of its divisors is an integer number (2610560844).

Almost surely, 2^5221121687 is an apocalyptic number.

5221121687 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221121687 is an equidigital number, since it uses as much as digits as its factorization.

5221121687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 5221121687 is about 72257.3296420508. The cubic root of 5221121687 is about 1734.8207381778.

The spelling of 5221121687 in words is "five billion, two hundred twenty-one million, one hundred twenty-one thousand, six hundred eighty-seven".