1312211422 has 4 divisors (see below), whose sum is σ = 1968317136. Its totient is φ = 656105710.

The previous prime is 1312211363. The next prime is 1312211429. The reversal of 1312211422 is 2241122131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2241122131 = 167 ⋅13419893.

It is a self number, because there is not a number n which added to its sum of digits gives 1312211422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312211429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328052854 + ... + 328052857.

It is an arithmetic number, because the mean of its divisors is an integer number (492079284).

Almost surely, 2^1312211422 is an apocalyptic number.

1312211422 is a deficient number, since it is larger than the sum of its proper divisors (656105714).

1312211422 is an equidigital number, since it uses as much as digits as its factorization.

1312211422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656105713.

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

The square root of 1312211422 is about 36224.4588917488. The cubic root of 1312211422 is about 1094.7995357331.

Adding to 1312211422 its reverse (2241122131), we get a palindrome (3553333553).

The spelling of 1312211422 in words is "one billion, three hundred twelve million, two hundred eleven thousand, four hundred twenty-two".