221252011 has 2 divisors, whose sum is σ = 221252012. Its totient is φ = 221252010.

The previous prime is 221251967. The next prime is 221252027. The reversal of 221252011 is 110252122.

It is a happy number.

It is an a-pointer prime, because the next prime (221252027) can be obtained adding 221252011 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221252011 - 2⁷ = 221251883 is a prime.

It is not a weakly prime, because it can be changed into another prime (221252081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110626005 + 110626006.

It is an arithmetic number, because the mean of its divisors is an integer number (110626006).

Almost surely, 2^221252011 is an apocalyptic number.

221252011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221252011 is an equidigital number, since it uses as much as digits as its factorization.

221252011 is an evil number, because the sum of its binary digits is even.

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

The square root of 221252011 is about 14874.5423795154. The cubic root of 221252011 is about 604.8240829060.

The spelling of 221252011 in words is "two hundred twenty-one million, two hundred fifty-two thousand, eleven".