1213131422 has 16 divisors (see below), whose sum is σ = 1883269440. Its totient is φ = 585393312.

The previous prime is 1213131419. The next prime is 1213131427. The reversal of 1213131422 is 2241313121.

It is a junction number, because it is equal to n+sod(n) for n = 1213131394 and 1213131403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213131427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251243 + ... + 256025.

It is an arithmetic number, because the mean of its divisors is an integer number (117704340).

Almost surely, 2^1213131422 is an apocalyptic number.

1213131422 is a deficient number, since it is larger than the sum of its proper divisors (670138018).

1213131422 is a wasteful number, since it uses less digits than its factorization.

1213131422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187.

The product of its digits is 288, while the sum is 20.

The square root of 1213131422 is about 34830.0362044027. The cubic root of 1213131422 is about 1066.5206874230.

Adding to 1213131422 its reverse (2241313121), we get a palindrome (3454444543).

The spelling of 1213131422 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, four hundred twenty-two".