221220112037 has 2 divisors, whose sum is σ = 221220112038. Its totient is φ = 221220112036.

The previous prime is 221220111979. The next prime is 221220112079. The reversal of 221220112037 is 730211022122.

221220112037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141786890116 + 79433221921 = 376546^2 + 281839^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220112037 - 2¹⁶ = 221220046501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220118037) 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, 110610056018 + 110610056019.

It is an arithmetic number, because the mean of its divisors is an integer number (110610056019).

Almost surely, 2^221220112037 is an apocalyptic number.

It is an amenable number.

221220112037 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220112037 is an equidigital number, since it uses as much as digits as its factorization.

221220112037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 221220112037 its reverse (730211022122), we get a palindrome (951431134159).

The spelling of 221220112037 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, thirty-seven".