3661122220109 has 2 divisors, whose sum is σ = 3661122220110. Its totient is φ = 3661122220108.

The previous prime is 3661122220099. The next prime is 3661122220117. The reversal of 3661122220109 is 9010222211663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1845190790884 + 1815931429225 = 1358378^2 + 1347565^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661122220109 - 2¹² = 3661122216013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661122220309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830561110054 + 1830561110055.

It is an arithmetic number, because the mean of its divisors is an integer number (1830561110055).

Almost surely, 2^{3661122220109} is an apocalyptic number.

It is an amenable number.

3661122220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661122220109 is an equidigital number, since it uses as much as digits as its factorization.

3661122220109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 3661122220109 in words is "three trillion, six hundred sixty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred nine".