21213033101133 has 4 divisors (see below), whose sum is σ = 28284044134848. Its totient is φ = 14142022067420.

The previous prime is 21213033101119. The next prime is 21213033101159. The reversal of 21213033101133 is 33110133031212.

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 21213033101133 - 2²⁰ = 21213032052557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213033101833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3535505516853 + ... + 3535505516858.

It is an arithmetic number, because the mean of its divisors is an integer number (7071011033712).

Almost surely, 2^{21213033101133} is an apocalyptic number.

It is an amenable number.

21213033101133 is a deficient number, since it is larger than the sum of its proper divisors (7071011033715).

21213033101133 is an equidigital number, since it uses as much as digits as its factorization.

21213033101133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071011033714.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21213033101133 its reverse (33110133031212), we get a palindrome (54323166132345).

The spelling of 21213033101133 in words is "twenty-one trillion, two hundred thirteen billion, thirty-three million, one hundred one thousand, one hundred thirty-three".