1213112422 has 4 divisors (see below), whose sum is σ = 1819668636. Its totient is φ = 606556210.

The previous prime is 1213112419. The next prime is 1213112443. The reversal of 1213112422 is 2242113121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2242113121 = 2557 ⋅876853.

It is a self number, because there is not a number n which added to its sum of digits gives 1213112422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303278104 + ... + 303278107.

It is an arithmetic number, because the mean of its divisors is an integer number (454917159).

Almost surely, 2^1213112422 is an apocalyptic number.

1213112422 is a deficient number, since it is larger than the sum of its proper divisors (606556214).

1213112422 is an equidigital number, since it uses as much as digits as its factorization.

1213112422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606556213.

The product of its digits is 192, while the sum is 19.

The square root of 1213112422 is about 34829.7634502447. The cubic root of 1213112422 is about 1066.5151194638.

Adding to 1213112422 its reverse (2242113121), we get a palindrome (3455225543).

The spelling of 1213112422 in words is "one billion, two hundred thirteen million, one hundred twelve thousand, four hundred twenty-two".