1321013213122 has 4 divisors (see below), whose sum is σ = 1981519819686. Its totient is φ = 660506606560.

The previous prime is 1321013213119. The next prime is 1321013213131. The reversal of 1321013213122 is 2213123101231.

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., 1292994135801 + 28019077321 = 1137099^2 + 167389^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321013213093 and 1321013213102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330253303279 + ... + 330253303282.

Almost surely, 2^{1321013213122} is an apocalyptic number.

1321013213122 is a deficient number, since it is larger than the sum of its proper divisors (660506606564).

1321013213122 is an equidigital number, since it uses as much as digits as its factorization.

1321013213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660506606563.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1321013213122 its reverse (2213123101231), we get a palindrome (3534136314353).

The spelling of 1321013213122 in words is "one trillion, three hundred twenty-one billion, thirteen million, two hundred thirteen thousand, one hundred twenty-two".