12812122 has 8 divisors (see below), whose sum is σ = 19233396. Its totient is φ = 6400992.

The previous prime is 12812119. The next prime is 12812123. The reversal of 12812122 is 22121821.

It can be written as a sum of positive squares in 2 ways, for example, as 8185321 + 4626801 = 2861^2 + 2151^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12812122.

It is not an unprimeable number, because it can be changed into a prime (12812123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3448 + ... + 6124.

Almost surely, 2^12812122 is an apocalyptic number.

12812122 is a deficient number, since it is larger than the sum of its proper divisors (6421274).

12812122 is a wasteful number, since it uses less digits than its factorization.

12812122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

The product of its digits is 128, while the sum is 19.

The square root of 12812122 is about 3579.4024640993. The cubic root of 12812122 is about 233.9952393898.

Adding to 12812122 its reverse (22121821), we get a palindrome (34933943).

It can be divided in two parts, 1281 and 2122, that added together give a triangular number (3403 = T₈₂).

The spelling of 12812122 in words is "twelve million, eight hundred twelve thousand, one hundred twenty-two".