2123201237 has 2 divisors, whose sum is σ = 2123201238. Its totient is φ = 2123201236.

The previous prime is 2123201221. The next prime is 2123201243. The reversal of 2123201237 is 7321023212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597920676 + 525280561 = 39974^2 + 22919^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123201237 - 2⁴ = 2123201221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123201287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061600618 + 1061600619.

It is an arithmetic number, because the mean of its divisors is an integer number (1061600619).

Almost surely, 2^2123201237 is an apocalyptic number.

It is an amenable number.

2123201237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123201237 is an equidigital number, since it uses as much as digits as its factorization.

2123201237 is an evil number, because the sum of its binary digits is even.

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

The square root of 2123201237 is about 46078.2078319025. The cubic root of 2123201237 is about 1285.2779379313.

Adding to 2123201237 its reverse (7321023212), we get a palindrome (9444224449).

The spelling of 2123201237 in words is "two billion, one hundred twenty-three million, two hundred one thousand, two hundred thirty-seven".