21134321403401 has 4 divisors (see below), whose sum is σ = 21142198529232. Its totient is φ = 21126444277572.

The previous prime is 21134321403347. The next prime is 21134321403451. The reversal of 21134321403401 is 10430412343112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21134321403401 is a prime.

It is a super-2 number, since 2×21134321403401² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134321403451) 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, 3938558891 + ... + 3938564256.

It is an arithmetic number, because the mean of its divisors is an integer number (5285549632308).

Almost surely, 2^{21134321403401} is an apocalyptic number.

It is an amenable number.

21134321403401 is a deficient number, since it is larger than the sum of its proper divisors (7877125831).

21134321403401 is an equidigital number, since it uses as much as digits as its factorization.

21134321403401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7877125830.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21134321403401 its reverse (10430412343112), we get a palindrome (31564733746513).

The spelling of 21134321403401 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty-one million, four hundred three thousand, four hundred one".