2101223237 has 2 divisors, whose sum is σ = 2101223238. Its totient is φ = 2101223236.

The previous prime is 2101223221. The next prime is 2101223261. The reversal of 2101223237 is 7323221012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1872639076 + 228584161 = 43274^2 + 15119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101223237 - 2⁴ = 2101223221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101223287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050611618 + 1050611619.

It is an arithmetic number, because the mean of its divisors is an integer number (1050611619).

Almost surely, 2^2101223237 is an apocalyptic number.

It is an amenable number.

2101223237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101223237 is an equidigital number, since it uses as much as digits as its factorization.

2101223237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2101223237 is about 45839.1016164148. The cubic root of 2101223237 is about 1280.8277598708.

Adding to 2101223237 its reverse (7323221012), we get a palindrome (9424444249).

The spelling of 2101223237 in words is "two billion, one hundred one million, two hundred twenty-three thousand, two hundred thirty-seven".