21210120033 has 8 divisors (see below), whose sum is σ = 29768589600. Its totient is φ = 13395865248.

The previous prime is 21210120017. The next prime is 21210120037. The reversal of 21210120033 is 33002101212.

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

It is not a de Polignac number, because 21210120033 - 2⁴ = 21210120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210119994 and 21210120021.

It is not an unprimeable number, because it can be changed into a prime (21210120037) 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, 186053628 + ... + 186053741.

It is an arithmetic number, because the mean of its divisors is an integer number (3721073700).

Almost surely, 2^21210120033 is an apocalyptic number.

It is an amenable number.

21210120033 is a deficient number, since it is larger than the sum of its proper divisors (8558469567).

21210120033 is a wasteful number, since it uses less digits than its factorization.

21210120033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372107391.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21210120033 its reverse (33002101212), we get a palindrome (54212221245).

The spelling of 21210120033 in words is "twenty-one billion, two hundred ten million, one hundred twenty thousand, thirty-three".