1321021420342 has 32 divisors (see below), whose sum is σ = 2138352152832. Its totient is φ = 608447869344.

The previous prime is 1321021420337. The next prime is 1321021420403. The reversal of 1321021420342 is 2430241201231.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 26637213 + ... + 26686759.

It is an arithmetic number, because the mean of its divisors is an integer number (66823504776).

Almost surely, 2^{1321021420342} is an apocalyptic number.

1321021420342 is a deficient number, since it is larger than the sum of its proper divisors (817330732490).

1321021420342 is a wasteful number, since it uses less digits than its factorization.

1321021420342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51652.

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

Adding to 1321021420342 its reverse (2430241201231), we get a palindrome (3751262621573).

The spelling of 1321021420342 in words is "one trillion, three hundred twenty-one billion, twenty-one million, four hundred twenty thousand, three hundred forty-two".