3498717876221 has 2 divisors, whose sum is σ = 3498717876222. Its totient is φ = 3498717876220.

The previous prime is 3498717876193. The next prime is 3498717876253. The reversal of 3498717876221 is 1226787178943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3498717876196 + 25 = 1870486^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3498717876221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3498717876271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1749358938110 + 1749358938111.

It is an arithmetic number, because the mean of its divisors is an integer number (1749358938111).

Almost surely, 2^{3498717876221} is an apocalyptic number.

It is an amenable number.

3498717876221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3498717876221 is an equidigital number, since it uses as much as digits as its factorization.

3498717876221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56899584, while the sum is 65.

The spelling of 3498717876221 in words is "three trillion, four hundred ninety-eight billion, seven hundred seventeen million, eight hundred seventy-six thousand, two hundred twenty-one".