21400331133 has 16 divisors (see below), whose sum is σ = 29018956736. Its totient is φ = 14025571200.

The previous prime is 21400331111. The next prime is 21400331159. The reversal of 21400331133 is 33113300412.

It is not a de Polignac number, because 21400331133 - 2⁹ = 21400330621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400331233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91918 + ... + 226383.

It is an arithmetic number, because the mean of its divisors is an integer number (1813684796).

Almost surely, 2^21400331133 is an apocalyptic number.

It is an amenable number.

21400331133 is a deficient number, since it is larger than the sum of its proper divisors (7618625603).

21400331133 is a wasteful number, since it uses less digits than its factorization.

21400331133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318684.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21400331133 its reverse (33113300412), we get a palindrome (54513631545).

The spelling of 21400331133 in words is "twenty-one billion, four hundred million, three hundred thirty-one thousand, one hundred thirty-three".