1321421343101 has 4 divisors (see below), whose sum is σ = 1321902037500. Its totient is φ = 1320940648704.

The previous prime is 1321421343083. The next prime is 1321421343113. The reversal of 1321421343101 is 1013431241231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 639312184900 + 682109158201 = 799570^2 + 825899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321421343101 - 2⁶ = 1321421343037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421393101) 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 3 ways as a sum of consecutive naturals, for example, 240343076 + ... + 240348573.

It is an arithmetic number, because the mean of its divisors is an integer number (330475509375).

Almost surely, 2^{1321421343101} is an apocalyptic number.

It is an amenable number.

1321421343101 is a deficient number, since it is larger than the sum of its proper divisors (480694399).

1321421343101 is an equidigital number, since it uses as much as digits as its factorization.

1321421343101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480694398.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1321421343101 its reverse (1013431241231), we get a palindrome (2334852584332).

The spelling of 1321421343101 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, one hundred one".