40222121 has 2 divisors, whose sum is σ = 40222122. Its totient is φ = 40222120.

The previous prime is 40222111. The next prime is 40222123. The reversal of 40222121 is 12122204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31584400 + 8637721 = 5620^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 40222121 - 2⁶ = 40222057 is a prime.

Together with 40222123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40222096 and 40222105.

It is not a weakly prime, because it can be changed into another prime (40222123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20111060 + 20111061.

It is an arithmetic number, because the mean of its divisors is an integer number (20111061).

Almost surely, 2^40222121 is an apocalyptic number.

It is an amenable number.

40222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40222121 is an equidigital number, since it uses as much as digits as its factorization.

40222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40222121 is about 6342.0912166256. The cubic root of 40222121 is about 342.6270571275.

Adding to 40222121 its reverse (12122204), we get a palindrome (52344325).

The spelling of 40222121 in words is "forty million, two hundred twenty-two thousand, one hundred twenty-one".