21403231133 has 4 divisors (see below), whose sum is σ = 21571760640. Its totient is φ = 21234701628.

The previous prime is 21403231121. The next prime is 21403231147. The reversal of 21403231133 is 33113230412.

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 21403231133 - 2²² = 21399036829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21403231099 and 21403231108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403231163) 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 in 3 ways as a sum of consecutive naturals, for example, 84264563 + ... + 84264816.

It is an arithmetic number, because the mean of its divisors is an integer number (5392940160).

Almost surely, 2^21403231133 is an apocalyptic number.

It is an amenable number.

21403231133 is a deficient number, since it is larger than the sum of its proper divisors (168529507).

21403231133 is a wasteful number, since it uses less digits than its factorization.

21403231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168529506.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21403231133 its reverse (33113230412), we get a palindrome (54516461545).

The spelling of 21403231133 in words is "twenty-one billion, four hundred three million, two hundred thirty-one thousand, one hundred thirty-three".