2121333030 has 128 divisors (see below), whose sum is σ = 5878656000. Its totient is φ = 543916800.

The previous prime is 2121333017. The next prime is 2121333077. The reversal of 2121333030 is 303331212.

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 = 2121332994 and 2121333012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 784621 + ... + 787319.

It is an arithmetic number, because the mean of its divisors is an integer number (45927000).

Almost surely, 2^2121333030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121333030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2939328000).

2121333030 is an abundant number, since it is smaller than the sum of its proper divisors (3757322970).

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

2121333030 is a wasteful number, since it uses less digits than its factorization.

2121333030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827 (or 2821 counting only the distinct ones).

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

The square root of 2121333030 is about 46057.9312388214. The cubic root of 2121333030 is about 1284.9008548416.

Adding to 2121333030 its reverse (303331212), we get a palindrome (2424664242).

The spelling of 2121333030 in words is "two billion, one hundred twenty-one million, three hundred thirty-three thousand, thirty".