1211210000069 has 2 divisors, whose sum is σ = 1211210000070. Its totient is φ = 1211210000068.

The previous prime is 1211209999921. The next prime is 1211210000107. The reversal of 1211210000069 is 9600000121121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869351112100 + 341858887969 = 932390^2 + 584687^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211210000069 - 2³² = 1206915032773 is a prime.

It is a super-2 number, since 2×1211210000069² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211209999999 and 1211210000053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211210000369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605000034 + 605605000035.

It is an arithmetic number, because the mean of its divisors is an integer number (605605000035).

Almost surely, 2^{1211210000069} is an apocalyptic number.

It is an amenable number.

1211210000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210000069 is an equidigital number, since it uses as much as digits as its factorization.

1211210000069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 1211210000069 in words is "one trillion, two hundred eleven billion, two hundred ten million, sixty-nine", and thus it is an aban number.