1321340021242 has 8 divisors (see below), whose sum is σ = 2035577870676. Its totient is φ = 642814064352.

The previous prime is 1321340021237. The next prime is 1321340021249. The reversal of 1321340021242 is 2421200431231.

It can be written as a sum of positive squares in 2 ways, for example, as 1316643797401 + 4696223841 = 1147451^2 + 68529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1321340021242² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321340021249) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 8927973043 + ... + 8927973190.

Almost surely, 2^{1321340021242} is an apocalyptic number.

1321340021242 is a deficient number, since it is larger than the sum of its proper divisors (714237849434).

1321340021242 is a wasteful number, since it uses less digits than its factorization.

1321340021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17855946272.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1321340021242 its reverse (2421200431231), we get a palindrome (3742540452473).

The spelling of 1321340021242 in words is "one trillion, three hundred twenty-one billion, three hundred forty million, twenty-one thousand, two hundred forty-two".