5211716120221 has 16 divisors (see below), whose sum is σ = 5633046526464. Its totient is φ = 4793328100224.

The previous prime is 5211716120129. The next prime is 5211716120231. The reversal of 5211716120221 is 1220216171125.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5211716120221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211716120231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4735896 + ... + 5731678.

It is an arithmetic number, because the mean of its divisors is an integer number (352065407904).

Almost surely, 2^{5211716120221} is an apocalyptic number.

It is an amenable number.

5211716120221 is a deficient number, since it is larger than the sum of its proper divisors (421330406243).

5211716120221 is a wasteful number, since it uses less digits than its factorization.

5211716120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997260.

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 5211716120221 in words is "five trillion, two hundred eleven billion, seven hundred sixteen million, one hundred twenty thousand, two hundred twenty-one".