1212211000823 has 2 divisors, whose sum is σ = 1212211000824. Its totient is φ = 1212211000822.

The previous prime is 1212211000813. The next prime is 1212211000901. The reversal of 1212211000823 is 3280001122121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3280001122121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211000823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212211000813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105500411 + 606105500412.

It is an arithmetic number, because the mean of its divisors is an integer number (606105500412).

Almost surely, 2^{1212211000823} is an apocalyptic number.

1212211000823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211000823 is an equidigital number, since it uses as much as digits as its factorization.

1212211000823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 1212211000823 its reverse (3280001122121), we get a palindrome (4492212122944).

The spelling of 1212211000823 in words is "one trillion, two hundred twelve billion, two hundred eleven million, eight hundred twenty-three", and thus it is an aban number.