221212100009969 has 2 divisors, whose sum is σ = 221212100009970. Its totient is φ = 221212100009968.

The previous prime is 221212100009963. The next prime is 221212100010007. The reversal of 221212100009969 is 969900001212122.

221212100009969 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., 141005531430625 + 80206568579344 = 11874575^2 + 8955812^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212100009969 - 2⁸ = 221212100009713 is a prime.

It is a super-2 number, since 2×221212100009969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221212100009963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606050004984 + 110606050004985.

It is an arithmetic number, because the mean of its divisors is an integer number (110606050004985).

Almost surely, 2^{221212100009969} is an apocalyptic number.

It is an amenable number.

221212100009969 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212100009969 is an equidigital number, since it uses as much as digits as its factorization.

221212100009969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 221212100009969 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred million, nine thousand, nine hundred sixty-nine".