1243312122 has 16 divisors (see below), whose sum is σ = 2677903200. Its totient is φ = 382557552.

The previous prime is 1243312069. The next prime is 1243312163. The reversal of 1243312122 is 2212133421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7969872 + ... + 7970027.

It is an arithmetic number, because the mean of its divisors is an integer number (167368950).

Almost surely, 2^1243312122 is an apocalyptic number.

1243312122 is an abundant number, since it is smaller than the sum of its proper divisors (1434591078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243312122 is a wasteful number, since it uses less digits than its factorization.

1243312122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15939917.

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

The square root of 1243312122 is about 35260.6313329753. The cubic root of 1243312122 is about 1075.2927623756.

Adding to 1243312122 its reverse (2212133421), we get a palindrome (3455445543).

The spelling of 1243312122 in words is "one billion, two hundred forty-three million, three hundred twelve thousand, one hundred twenty-two".