1212123243 has 8 divisors (see below), whose sum is σ = 1621876288. Its totient is φ = 805226184.

The previous prime is 1212123223. The next prime is 1212123247. The reversal of 1212123243 is 3423212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212123243 - 2¹² = 1212119147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212123247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713005 + ... + 714702.

It is an arithmetic number, because the mean of its divisors is an integer number (202734536).

Almost surely, 2^1212123243 is an apocalyptic number.

1212123243 is a deficient number, since it is larger than the sum of its proper divisors (409753045).

1212123243 is a wasteful number, since it uses less digits than its factorization.

1212123243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427993.

The product of its digits is 576, while the sum is 21.

The square root of 1212123243 is about 34815.5603574034. The cubic root of 1212123243 is about 1066.2251597386.

Adding to 1212123243 its reverse (3423212121), we get a palindrome (4635335364).

The spelling of 1212123243 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, two hundred forty-three".