1212403204223 has 2 divisors, whose sum is σ = 1212403204224. Its totient is φ = 1212403204222.

The previous prime is 1212403204213. The next prime is 1212403204241. The reversal of 1212403204223 is 3224023042121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212403204223 - 2²⁰ = 1212402155647 is a prime.

It is a super-2 number, since 2×1212403204223² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212403204192 and 1212403204201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212403204213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606201602111 + 606201602112.

It is an arithmetic number, because the mean of its divisors is an integer number (606201602112).

Almost surely, 2^{1212403204223} is an apocalyptic number.

1212403204223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212403204223 is an equidigital number, since it uses as much as digits as its factorization.

1212403204223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1212403204223 its reverse (3224023042121), we get a palindrome (4436426246344).

The spelling of 1212403204223 in words is "one trillion, two hundred twelve billion, four hundred three million, two hundred four thousand, two hundred twenty-three".