222561011 has 2 divisors, whose sum is σ = 222561012. Its totient is φ = 222561010.

The previous prime is 222560999. The next prime is 222561019. The reversal of 222561011 is 110165222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222561011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222561019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111280505 + 111280506.

It is an arithmetic number, because the mean of its divisors is an integer number (111280506).

Almost surely, 2^222561011 is an apocalyptic number.

222561011 is a deficient number, since it is larger than the sum of its proper divisors (1).

222561011 is an equidigital number, since it uses as much as digits as its factorization.

222561011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 222561011 is about 14918.4788433674. The cubic root of 222561011 is about 606.0145180182.

It can be divided in two parts, 2225 and 61011, that added together give a palindrome (63236).

The spelling of 222561011 in words is "two hundred twenty-two million, five hundred sixty-one thousand, eleven".