2012221011601 has 2 divisors, whose sum is σ = 2012221011602. Its totient is φ = 2012221011600.

The previous prime is 2012221011539. The next prime is 2012221011631. The reversal of 2012221011601 is 1061101222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1990765793025 + 21455218576 = 1410945^2 + 146476^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012221011601 - 2⁷ = 2012221011473 is a prime.

It is not a weakly prime, because it can be changed into another prime (2012221011631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006110505800 + 1006110505801.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110505801).

Almost surely, 2^{2012221011601} is an apocalyptic number.

It is an amenable number.

2012221011601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012221011601 is an equidigital number, since it uses as much as digits as its factorization.

2012221011601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2012221011601 its reverse (1061101222102), we get a palindrome (3073322233703).

The spelling of 2012221011601 in words is "two trillion, twelve billion, two hundred twenty-one million, eleven thousand, six hundred one".