22212421237 has 2 divisors, whose sum is σ = 22212421238. Its totient is φ = 22212421236.

The previous prime is 22212421117. The next prime is 22212421267. The reversal of 22212421237 is 73212421222.

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., 16459350436 + 5753070801 = 128294^2 + 75849^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212421237 - 2¹⁵ = 22212388469 is a prime.

It is a super-2 number, since 2×22212421237² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212421267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106210618 + 11106210619.

It is an arithmetic number, because the mean of its divisors is an integer number (11106210619).

Almost surely, 2^22212421237 is an apocalyptic number.

It is an amenable number.

22212421237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212421237 is an equidigital number, since it uses as much as digits as its factorization.

22212421237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

Adding to 22212421237 its reverse (73212421222), we get a palindrome (95424842459).

The spelling of 22212421237 in words is "twenty-two billion, two hundred twelve million, four hundred twenty-one thousand, two hundred thirty-seven".