21021333030 has 80 divisors (see below), whose sum is σ = 57838636944. Its totient is φ = 5475314880.

The previous prime is 21021333001. The next prime is 21021333041. The reversal of 21021333030 is 3033312012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21021332994 and 21021333012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 266941 + ... + 336600.

Almost surely, 2^21021333030 is an apocalyptic number.

21021333030 is an abundant number, since it is smaller than the sum of its proper divisors (36817303914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021333030 is a wasteful number, since it uses less digits than its factorization.

21021333030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603603 (or 603594 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21021333030 its reverse (3033312012), we get a palindrome (24054645042).

The spelling of 21021333030 in words is "twenty-one billion, twenty-one million, three hundred thirty-three thousand, thirty".