1212421201223 has 2 divisors, whose sum is σ = 1212421201224. Its totient is φ = 1212421201222.

The previous prime is 1212421201171. The next prime is 1212421201267. The reversal of 1212421201223 is 3221021242121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212421201223 - 2¹⁶ = 1212421135687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212421207223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606210600611 + 606210600612.

It is an arithmetic number, because the mean of its divisors is an integer number (606210600612).

Almost surely, 2^{1212421201223} is an apocalyptic number.

1212421201223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212421201223 is an equidigital number, since it uses as much as digits as its factorization.

1212421201223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1212421201223 its reverse (3221021242121), we get a palindrome (4433442443344).

The spelling of 1212421201223 in words is "one trillion, two hundred twelve billion, four hundred twenty-one million, two hundred one thousand, two hundred twenty-three".