1321123131122 has 4 divisors (see below), whose sum is σ = 1981684696686. Its totient is φ = 660561565560.

The previous prime is 1321123131109. The next prime is 1321123131149. The reversal of 1321123131122 is 2211313211231.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1132055568361 + 189067562761 = 1063981^2 + 434819^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330280782779 + ... + 330280782782.

Almost surely, 2^{1321123131122} is an apocalyptic number.

1321123131122 is a deficient number, since it is larger than the sum of its proper divisors (660561565564).

1321123131122 is an equidigital number, since it uses as much as digits as its factorization.

1321123131122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660561565563.

The product of its digits is 432, while the sum is 23.

Adding to 1321123131122 its reverse (2211313211231), we get a palindrome (3532436342353).

The spelling of 1321123131122 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-two".