222521011 has 2 divisors, whose sum is σ = 222521012. Its totient is φ = 222521010.

The previous prime is 222520957. The next prime is 222521111. The reversal of 222521011 is 110125222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222521011 - 2²¹ = 220423859 is a prime.

It is not a weakly prime, because it can be changed into another prime (222521111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111260505 + 111260506.

It is an arithmetic number, because the mean of its divisors is an integer number (111260506).

Almost surely, 2^222521011 is an apocalyptic number.

222521011 is a deficient number, since it is larger than the sum of its proper divisors (1).

222521011 is an equidigital number, since it uses as much as digits as its factorization.

222521011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 222521011 is about 14917.1381638704. The cubic root of 222521011 is about 605.9782103215.

Adding to 222521011 its reverse (110125222), we get a palindrome (332646233).

The spelling of 222521011 in words is "two hundred twenty-two million, five hundred twenty-one thousand, eleven".