21031033133 has 8 divisors (see below), whose sum is σ = 22946470560. Its totient is φ = 19116183280.

The previous prime is 21031033117. The next prime is 21031033147. The reversal of 21031033133 is 33133013012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21031033133 - 2⁴ = 21031033117 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 (21031033193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70310 + ... + 216807.

It is an arithmetic number, because the mean of its divisors is an integer number (2868308820).

Almost surely, 2^21031033133 is an apocalyptic number.

It is an amenable number.

21031033133 is a deficient number, since it is larger than the sum of its proper divisors (1915437427).

21031033133 is a wasteful number, since it uses less digits than its factorization.

21031033133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293787.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21031033133 its reverse (33133013012), we get a palindrome (54164046145).

The spelling of 21031033133 in words is "twenty-one billion, thirty-one million, thirty-three thousand, one hundred thirty-three".