1320221423042 has 4 divisors (see below), whose sum is σ = 1980332134566. Its totient is φ = 660110711520.

The previous prime is 1320221423021. The next prime is 1320221423107. The reversal of 1320221423042 is 2403241220231.

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., 1204749907321 + 115471515721 = 1097611^2 + 339811^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330055355759 + ... + 330055355762.

Almost surely, 2^{1320221423042} is an apocalyptic number.

1320221423042 is a deficient number, since it is larger than the sum of its proper divisors (660110711524).

1320221423042 is an equidigital number, since it uses as much as digits as its factorization.

1320221423042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660110711523.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1320221423042 its reverse (2403241220231), we get a palindrome (3723462643273).

The spelling of 1320221423042 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, four hundred twenty-three thousand, forty-two".