201221211200969 has 2 divisors, whose sum is σ = 201221211200970. Its totient is φ = 201221211200968.

The previous prime is 201221211200957. The next prime is 201221211200983. The reversal of 201221211200969 is 969002112122102.

201221211200969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121431297650569 + 79789913550400 = 11019587^2 + 8932520^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221211200969 - 2¹⁶ = 201221211135433 is a prime.

It is a super-2 number, since 2×201221211200969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201221211209969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610605600484 + 100610605600485.

It is an arithmetic number, because the mean of its divisors is an integer number (100610605600485).

Almost surely, 2^{201221211200969} is an apocalyptic number.

It is an amenable number.

201221211200969 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221211200969 is an equidigital number, since it uses as much as digits as its factorization.

201221211200969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 201221211200969 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred thousand, nine hundred sixty-nine".