21330102021 has 8 divisors (see below), whose sum is σ = 28441883904. Its totient is φ = 14219194080.

The previous prime is 21330101987. The next prime is 21330102047. The reversal of 21330102021 is 12020103312.

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

It is not a de Polignac number, because 21330102021 - 2⁶ = 21330101957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330102421) 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, 159240 + ... + 260801.

It is an arithmetic number, because the mean of its divisors is an integer number (3555235488).

Almost surely, 2^21330102021 is an apocalyptic number.

It is an amenable number.

21330102021 is a deficient number, since it is larger than the sum of its proper divisors (7111781883).

21330102021 is a wasteful number, since it uses less digits than its factorization.

21330102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436971.

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

Adding to 21330102021 its reverse (12020103312), we get a palindrome (33350205333).

The spelling of 21330102021 in words is "twenty-one billion, three hundred thirty million, one hundred two thousand, twenty-one".