21130210033 has 4 divisors (see below), whose sum is σ = 21131759088. Its totient is φ = 21128660980.

The previous prime is 21130209983. The next prime is 21130210051. The reversal of 21130210033 is 33001203112.

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 21130210033 - 2²¹ = 21128112881 is a prime.

It is a super-3 number, since 3×21130210033³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130209989 and 21130210016.

It is not an unprimeable number, because it can be changed into a prime (21130210433) 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, 753883 + ... + 781408.

It is an arithmetic number, because the mean of its divisors is an integer number (5282939772).

Almost surely, 2^21130210033 is an apocalyptic number.

It is an amenable number.

21130210033 is a deficient number, since it is larger than the sum of its proper divisors (1549055).

21130210033 is a wasteful number, since it uses less digits than its factorization.

21130210033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549054.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21130210033 its reverse (33001203112), we get a palindrome (54131413145).

The spelling of 21130210033 in words is "twenty-one billion, one hundred thirty million, two hundred ten thousand, thirty-three".