1212123223 has 2 divisors, whose sum is σ = 1212123224. Its totient is φ = 1212123222.

The previous prime is 1212123203. The next prime is 1212123247. The reversal of 1212123223 is 3223212121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212123223 - 2⁵ = 1212123191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212123223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212123203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061611 + 606061612.

It is an arithmetic number, because the mean of its divisors is an integer number (606061612).

Almost surely, 2^1212123223 is an apocalyptic number.

1212123223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212123223 is an equidigital number, since it uses as much as digits as its factorization.

1212123223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 1212123223 is about 34815.5600701755. The cubic root of 1212123223 is about 1066.2251538744.

Adding to 1212123223 its reverse (3223212121), we get a palindrome (4435335344).

It can be divided in two parts, 12121 and 23223, that added together give a square (35344 = 188²).

The spelling of 1212123223 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, two hundred twenty-three".