21134321403452 has 6 divisors (see below), whose sum is σ = 36985062456048. Its totient is φ = 10567160701724.

The previous prime is 21134321403451. The next prime is 21134321403589. The reversal of 21134321403452 is 25430412343112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134321403451) 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 as a sum of consecutive naturals, namely, 2641790175428 + ... + 2641790175435.

It is an arithmetic number, because the mean of its divisors is an integer number (6164177076008).

Almost surely, 2^{21134321403452} is an apocalyptic number.

It is an amenable number.

21134321403452 is a deficient number, since it is larger than the sum of its proper divisors (15850741052596).

21134321403452 is a wasteful number, since it uses less digits than its factorization.

21134321403452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283580350867 (or 5283580350865 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21134321403452 its reverse (25430412343112), we get a palindrome (46564733746564).

The spelling of 21134321403452 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty-one million, four hundred three thousand, four hundred fifty-two".