2061226621 has 2 divisors, whose sum is σ = 2061226622. Its totient is φ = 2061226620.

The previous prime is 2061226597. The next prime is 2061226633. The reversal of 2061226621 is 1266221602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2053358596 + 7868025 = 45314^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061226621 - 2⁹ = 2061226109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2061226621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061221621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030613310 + 1030613311.

It is an arithmetic number, because the mean of its divisors is an integer number (1030613311).

Almost surely, 2^2061226621 is an apocalyptic number.

It is an amenable number.

2061226621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061226621 is an equidigital number, since it uses as much as digits as its factorization.

2061226621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2061226621 is about 45400.7337055251. The cubic root of 2061226621 is about 1272.6488251820.

The spelling of 2061226621 in words is "two billion, sixty-one million, two hundred twenty-six thousand, six hundred twenty-one".