201221211000269 has 2 divisors, whose sum is σ = 201221211000270. Its totient is φ = 201221211000268.

The previous prime is 201221211000253. The next prime is 201221211000319. The reversal of 201221211000269 is 962000112122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128916154515625 + 72305056484644 = 11354125^2 + 8503238^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221211000269 - 2⁴ = 201221211000253 is a prime.

It is a super-2 number, since 2×201221211000269² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221211000209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610605500134 + 100610605500135.

It is an arithmetic number, because the mean of its divisors is an integer number (100610605500135).

Almost surely, 2^{201221211000269} is an apocalyptic number.

It is an amenable number.

201221211000269 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221211000269 is an equidigital number, since it uses as much as digits as its factorization.

201221211000269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 201221211000269 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred sixty-nine", and thus it is an aban number.