1212347123 has 8 divisors (see below), whose sum is σ = 1327008816. Its totient is φ = 1100743200.

The previous prime is 1212347107. The next prime is 1212347141. The reversal of 1212347123 is 3217432121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212347123 - 2⁴ = 1212347107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212347092 and 1212347101.

It is not an unprimeable number, because it can be changed into a prime (1212347173) 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, 763613 + ... + 765198.

It is an arithmetic number, because the mean of its divisors is an integer number (165876102).

Almost surely, 2^1212347123 is an apocalyptic number.

1212347123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1212347123 is a deficient number, since it is larger than the sum of its proper divisors (114661693).

1212347123 is a wasteful number, since it uses less digits than its factorization.

1212347123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528885.

The product of its digits is 2016, while the sum is 26.

The square root of 1212347123 is about 34818.7754379731. The cubic root of 1212347123 is about 1066.2907998720.

Adding to 1212347123 its reverse (3217432121), we get a palindrome (4429779244).

The spelling of 1212347123 in words is "one billion, two hundred twelve million, three hundred forty-seven thousand, one hundred twenty-three".