1321214042 has 4 divisors (see below), whose sum is σ = 1981821066. Its totient is φ = 660607020.

The previous prime is 1321214033. The next prime is 1321214099. The reversal of 1321214042 is 2404121231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2404121231 = 19543 ⋅123017.

It can be written as a sum of positive squares in only one way, i.e., 1302560281 + 18653761 = 36091^2 + 4319^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330303509 + ... + 330303512.

Almost surely, 2^1321214042 is an apocalyptic number.

1321214042 is a deficient number, since it is larger than the sum of its proper divisors (660607024).

1321214042 is an equidigital number, since it uses as much as digits as its factorization.

1321214042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660607023.

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

The square root of 1321214042 is about 36348.5081124384. The cubic root of 1321214042 is about 1097.2975097357.

Adding to 1321214042 its reverse (2404121231), we get a palindrome (3725335273).

The spelling of 1321214042 in words is "one billion, three hundred twenty-one million, two hundred fourteen thousand, forty-two".