22210121 has 2 divisors, whose sum is σ = 22210122. Its totient is φ = 22210120.

The previous prime is 22210103. The next prime is 22210129. The reversal of 22210121 is 12101222.

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., 19009600 + 3200521 = 4360^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 22210121 - 2⁶ = 22210057 is a prime.

It is not a weakly prime, because it can be changed into another prime (22210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105060 + 11105061.

It is an arithmetic number, because the mean of its divisors is an integer number (11105061).

Almost surely, 2^22210121 is an apocalyptic number.

It is an amenable number.

22210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22210121 is an equidigital number, since it uses as much as digits as its factorization.

22210121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 22210121 is about 4712.7615046807. The cubic root of 22210121 is about 281.0931796705.

Adding to 22210121 its reverse (12101222), we get a palindrome (34311343).

The spelling of 22210121 in words is "twenty-two million, two hundred ten thousand, one hundred twenty-one".