1321213421001 has 32 divisors (see below), whose sum is σ = 1807655915520. Its totient is φ = 858146889600.

The previous prime is 1321213420981. The next prime is 1321213421053. The reversal of 1321213421001 is 1001243121231.

It is not a de Polignac number, because 1321213421001 - 2¹³ = 1321213412809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321213421501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6763186 + ... + 6955796.

It is an arithmetic number, because the mean of its divisors is an integer number (56489247360).

Almost surely, 2^{1321213421001} is an apocalyptic number.

It is an amenable number.

1321213421001 is a deficient number, since it is larger than the sum of its proper divisors (486442494519).

1321213421001 is a wasteful number, since it uses less digits than its factorization.

1321213421001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193077.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1321213421001 its reverse (1001243121231), we get a palindrome (2322456542232).

The spelling of 1321213421001 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, four hundred twenty-one thousand, one".