1212232123 has 4 divisors (see below), whose sum is σ = 1216369728. Its totient is φ = 1208094520.

The previous prime is 1212232111. The next prime is 1212232159. The reversal of 1212232123 is 3212322121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212232123 - 2¹³ = 1212223931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212232123.

It is not an unprimeable number, because it can be changed into a prime (1212232193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068363 + ... + 2068948.

It is an arithmetic number, because the mean of its divisors is an integer number (304092432).

Almost surely, 2^1212232123 is an apocalyptic number.

1212232123 is a deficient number, since it is larger than the sum of its proper divisors (4137605).

1212232123 is an equidigital number, since it uses as much as digits as its factorization.

1212232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137604.

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

The square root of 1212232123 is about 34817.1239909330. The cubic root of 1212232123 is about 1066.2570836430.

Adding to 1212232123 its reverse (3212322121), we get a palindrome (4424554244).

The spelling of 1212232123 in words is "one billion, two hundred twelve million, two hundred thirty-two thousand, one hundred twenty-three".