5097961421621 has 2 divisors, whose sum is σ = 5097961421622. Its totient is φ = 5097961421620.

The previous prime is 5097961421573. The next prime is 5097961421687. The reversal of 5097961421621 is 1261241697905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4750438202500 + 347523219121 = 2179550^2 + 589511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5097961421621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5097961421821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2548980710810 + 2548980710811.

It is an arithmetic number, because the mean of its divisors is an integer number (2548980710811).

Almost surely, 2^{5097961421621} is an apocalyptic number.

It is an amenable number.

5097961421621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5097961421621 is an equidigital number, since it uses as much as digits as its factorization.

5097961421621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 5097961421621 in words is "five trillion, ninety-seven billion, nine hundred sixty-one million, four hundred twenty-one thousand, six hundred twenty-one".