22121003 has 2 divisors, whose sum is σ = 22121004. Its totient is φ = 22121002.

The previous prime is 22120957. The next prime is 22121041. The reversal of 22121003 is 30012122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121003 - 2¹² = 22116907 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060501 + 11060502.

It is an arithmetic number, because the mean of its divisors is an integer number (11060502).

Almost surely, 2^22121003 is an apocalyptic number.

22121003 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121003 is an equidigital number, since it uses as much as digits as its factorization.

22121003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22121003 is about 4703.2970350596. The cubic root of 22121003 is about 280.7167140369.

Adding to 22121003 its reverse (30012122), we get a palindrome (52133125).

The spelling of 22121003 in words is "twenty-two million, one hundred twenty-one thousand, three".