1231222042 has 16 divisors (see below), whose sum is σ = 1956165120. Its totient is φ = 579192768.

The previous prime is 1231222037. The next prime is 1231222043. The reversal of 1231222042 is 2402221321.

It is not an unprimeable number, because it can be changed into a prime (1231222043) 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, 137053 + ... + 145759.

It is an arithmetic number, because the mean of its divisors is an integer number (122260320).

Almost surely, 2^1231222042 is an apocalyptic number.

1231222042 is a deficient number, since it is larger than the sum of its proper divisors (724943078).

1231222042 is a wasteful number, since it uses less digits than its factorization.

1231222042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1231222042 is about 35088.7737317792. The cubic root of 1231222042 is about 1071.7959886193.

Adding to 1231222042 its reverse (2402221321), we get a palindrome (3633443363).

The spelling of 1231222042 in words is "one billion, two hundred thirty-one million, two hundred twenty-two thousand, forty-two".