22521101 has 2 divisors, whose sum is σ = 22521102. Its totient is φ = 22521100.

The previous prime is 22521091. The next prime is 22521113. The reversal of 22521101 is 10112522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 2280100 = 4499^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 22521101 - 2¹⁰ = 22520077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22521901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260550 + 11260551.

It is an arithmetic number, because the mean of its divisors is an integer number (11260551).

Almost surely, 2^22521101 is an apocalyptic number.

It is an amenable number.

22521101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521101 is an equidigital number, since it uses as much as digits as its factorization.

22521101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 22521101 is about 4745.6402097083. The cubic root of 22521101 is about 282.3990335403.

Adding to 22521101 its reverse (10112522), we get a palindrome (32633623).

It can be divided in two parts, 22521 and 101, that added together give a palindrome (22622).

The spelling of 22521101 in words is "twenty-two million, five hundred twenty-one thousand, one hundred one".