1212213122 has 4 divisors (see below), whose sum is σ = 1818319686. Its totient is φ = 606106560.

The previous prime is 1212213097. The next prime is 1212213133. The reversal of 1212213122 is 2213122121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2213122121 = 7 ⋅316160303.

It can be written as a sum of positive squares in only one way, i.e., 1187422681 + 24790441 = 34459^2 + 4979^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212213122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303053279 + ... + 303053282.

Almost surely, 2^1212213122 is an apocalyptic number.

1212213122 is a deficient number, since it is larger than the sum of its proper divisors (606106564).

1212213122 is an equidigital number, since it uses as much as digits as its factorization.

1212213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606106563.

The product of its digits is 96, while the sum is 17.

The square root of 1212213122 is about 34816.8511212602. The cubic root of 1212213122 is about 1066.2515126372.

Adding to 1212213122 its reverse (2213122121), we get a palindrome (3425335243).

It can be divided in two parts, 121 and 2213122, that multiplied together give a palindrome (267787762).

The spelling of 1212213122 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, one hundred twenty-two".