61050500221 has 2 divisors, whose sum is σ = 61050500222. Its totient is φ = 61050500220.

The previous prime is 61050500207. The next prime is 61050500233. The reversal of 61050500221 is 12200505016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58074252196 + 2976248025 = 240986^2 + 54555^2 .

It is a cyclic number.

It is not a de Polignac number, because 61050500221 - 2¹⁵ = 61050467453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61050500192 and 61050500201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61050500201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30525250110 + 30525250111.

It is an arithmetic number, because the mean of its divisors is an integer number (30525250111).

Almost surely, 2^61050500221 is an apocalyptic number.

It is an amenable number.

61050500221 is a deficient number, since it is larger than the sum of its proper divisors (1).

61050500221 is an equidigital number, since it uses as much as digits as its factorization.

61050500221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 61050500221 in words is "sixty-one billion, fifty million, five hundred thousand, two hundred twenty-one".