21400133401 has 4 divisors (see below), whose sum is σ = 21464786704. Its totient is φ = 21335480100.

The previous prime is 21400133387. The next prime is 21400133411. The reversal of 21400133401 is 10433100412.

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 not a de Polignac number, because 21400133401 - 2⁹ = 21400132889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400133411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32326155 + ... + 32326816.

It is an arithmetic number, because the mean of its divisors is an integer number (5366196676).

Almost surely, 2^21400133401 is an apocalyptic number.

It is an amenable number.

21400133401 is a deficient number, since it is larger than the sum of its proper divisors (64653303).

21400133401 is an equidigital number, since it uses as much as digits as its factorization.

21400133401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64653302.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21400133401 its reverse (10433100412), we get a palindrome (31833233813).

The spelling of 21400133401 in words is "twenty-one billion, four hundred million, one hundred thirty-three thousand, four hundred one".