221021110969229 has 2 divisors, whose sum is σ = 221021110969230. Its totient is φ = 221021110969228.

The previous prime is 221021110969151. The next prime is 221021110969259. The reversal of 221021110969229 is 922969011120122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160310366245129 + 60710744724100 = 12661373^2 + 7791710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021110969229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221021110969259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510555484614 + 110510555484615.

It is an arithmetic number, because the mean of its divisors is an integer number (110510555484615).

Almost surely, 2^{221021110969229} is an apocalyptic number.

It is an amenable number.

221021110969229 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021110969229 is an equidigital number, since it uses as much as digits as its factorization.

221021110969229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 221021110969229 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred ten million, nine hundred sixty-nine thousand, two hundred twenty-nine".