1212151223 has 2 divisors, whose sum is σ = 1212151224. Its totient is φ = 1212151222.

The previous prime is 1212151163. The next prime is 1212151231. The reversal of 1212151223 is 3221512121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212151223 - 2⁶ = 1212151159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212151195 and 1212151204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214151223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606075611 + 606075612.

It is an arithmetic number, because the mean of its divisors is an integer number (606075612).

Almost surely, 2^1212151223 is an apocalyptic number.

1212151223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212151223 is an equidigital number, since it uses as much as digits as its factorization.

1212151223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 1212151223 is about 34815.9621869050. The cubic root of 1212151223 is about 1066.2333637313.

Adding to 1212151223 its reverse (3221512121), we get a palindrome (4433663344).

The spelling of 1212151223 in words is "one billion, two hundred twelve million, one hundred fifty-one thousand, two hundred twenty-three".