2101213237 has 2 divisors, whose sum is σ = 2101213238. Its totient is φ = 2101213236.

The previous prime is 2101213123. The next prime is 2101213271. The reversal of 2101213237 is 7323121012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1877142276 + 224070961 = 43326^2 + 14969^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101213237 - 2⁷ = 2101213109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101213297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050606618 + 1050606619.

It is an arithmetic number, because the mean of its divisors is an integer number (1050606619).

Almost surely, 2^2101213237 is an apocalyptic number.

It is an amenable number.

2101213237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101213237 is an equidigital number, since it uses as much as digits as its factorization.

2101213237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 2101213237 is about 45838.9925391036. The cubic root of 2101213237 is about 1280.8257279912.

Adding to 2101213237 its reverse (7323121012), we get a palindrome (9424334249).

The spelling of 2101213237 in words is "two billion, one hundred one million, two hundred thirteen thousand, two hundred thirty-seven".