212132221237 has 2 divisors, whose sum is σ = 212132221238. Its totient is φ = 212132221236.

The previous prime is 212132221229. The next prime is 212132221321. The reversal of 212132221237 is 732122231212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211343397841 + 788823396 = 459721^2 + 28086^2 .

It is a cyclic number.

It is not a de Polignac number, because 212132221237 - 2³ = 212132221229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212132221207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106066110618 + 106066110619.

It is an arithmetic number, because the mean of its divisors is an integer number (106066110619).

Almost surely, 2^212132221237 is an apocalyptic number.

It is an amenable number.

212132221237 is a deficient number, since it is larger than the sum of its proper divisors (1).

212132221237 is an equidigital number, since it uses as much as digits as its factorization.

212132221237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

Adding to 212132221237 its reverse (732122231212), we get a palindrome (944254452449).

The spelling of 212132221237 in words is "two hundred twelve billion, one hundred thirty-two million, two hundred twenty-one thousand, two hundred thirty-seven".