221001123229 has 2 divisors, whose sum is σ = 221001123230. Its totient is φ = 221001123228.

The previous prime is 221001123169. The next prime is 221001123253. The reversal of 221001123229 is 922321100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132270416100 + 88730707129 = 363690^2 + 297877^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001123229 - 2⁹ = 221001122717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221001123829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500561614 + 110500561615.

It is an arithmetic number, because the mean of its divisors is an integer number (110500561615).

Almost surely, 2^221001123229 is an apocalyptic number.

It is an amenable number.

221001123229 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001123229 is an equidigital number, since it uses as much as digits as its factorization.

221001123229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 221001123229 in words is "two hundred twenty-one billion, one million, one hundred twenty-three thousand, two hundred twenty-nine".