2121234330 has 64 divisors (see below), whose sum is σ = 5413868928. Its totient is φ = 530073600.

The previous prime is 2121234329. The next prime is 2121234337. The reversal of 2121234330 is 334321212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121234297 and 2121234306.

It is not an unprimeable number, because it can be changed into a prime (2121234337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109905 + ... + 127755.

It is an arithmetic number, because the mean of its divisors is an integer number (84591702).

Almost surely, 2^2121234330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121234330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2706934464).

2121234330 is an abundant number, since it is smaller than the sum of its proper divisors (3292634598).

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

2121234330 is a wasteful number, since it uses less digits than its factorization.

2121234330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18111.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2121234330 is about 46056.8597496616. The cubic root of 2121234330 is about 1284.8809268561.

Adding to 2121234330 its reverse (334321212), we get a palindrome (2455555542).

The spelling of 2121234330 in words is "two billion, one hundred twenty-one million, two hundred thirty-four thousand, three hundred thirty".