1242131222 has 4 divisors (see below), whose sum is σ = 1863196836. Its totient is φ = 621065610.

The previous prime is 1242131207. The next prime is 1242131237. The reversal of 1242131222 is 2221312421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1242131207) and next prime (1242131237).

It is a junction number, because it is equal to n+sod(n) for n = 1242131194 and 1242131203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310532804 + ... + 310532807.

It is an arithmetic number, because the mean of its divisors is an integer number (465799209).

Almost surely, 2^1242131222 is an apocalyptic number.

1242131222 is a deficient number, since it is larger than the sum of its proper divisors (621065614).

1242131222 is an equidigital number, since it uses as much as digits as its factorization.

1242131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621065613.

The product of its digits is 384, while the sum is 20.

The square root of 1242131222 is about 35243.8820506482. The cubic root of 1242131222 is about 1074.9522162283.

Adding to 1242131222 its reverse (2221312421), we get a palindrome (3463443643).

The spelling of 1242131222 in words is "one billion, two hundred forty-two million, one hundred thirty-one thousand, two hundred twenty-two".