221011121210969 has 2 divisors, whose sum is σ = 221011121210970. Its totient is φ = 221011121210968.

The previous prime is 221011121210963. The next prime is 221011121211043. The reversal of 221011121210969 is 969012121110122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144662199553600 + 76348921657369 = 12027560^2 + 8737787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221011121210969 is a prime.

It is a super-2 number, since 2×221011121210969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221011121210963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505560605484 + 110505560605485.

It is an arithmetic number, because the mean of its divisors is an integer number (110505560605485).

Almost surely, 2^{221011121210969} is an apocalyptic number.

It is an amenable number.

221011121210969 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011121210969 is an equidigital number, since it uses as much as digits as its factorization.

221011121210969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 221011121210969 in words is "two hundred twenty-one trillion, eleven billion, one hundred twenty-one million, two hundred ten thousand, nine hundred sixty-nine".