21343424131201 has 4 divisors (see below), whose sum is σ = 21352732212052. Its totient is φ = 21334116050352.

The previous prime is 21343424131163. The next prime is 21343424131219. The reversal of 21343424131201 is 10213142434312.

It is a happy number.

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 9911012126976 + 11432412004225 = 3148176^2 + 3381185^2 .

It is a cyclic number.

It is not a de Polignac number, because 21343424131201 - 2²¹ = 21343422034049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343424131291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4654036986 + ... + 4654041571.

It is an arithmetic number, because the mean of its divisors is an integer number (5338183053013).

Almost surely, 2^{21343424131201} is an apocalyptic number.

It is an amenable number.

21343424131201 is a deficient number, since it is larger than the sum of its proper divisors (9308080851).

21343424131201 is an equidigital number, since it uses as much as digits as its factorization.

21343424131201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9308080850.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21343424131201 its reverse (10213142434312), we get a palindrome (31556566565513).

The spelling of 21343424131201 in words is "twenty-one trillion, three hundred forty-three billion, four hundred twenty-four million, one hundred thirty-one thousand, two hundred one".