212121002330 has 8 divisors (see below), whose sum is σ = 381817804212. Its totient is φ = 84848400928.

The previous prime is 212121002297. The next prime is 212121002347. The reversal of 212121002330 is 33200121212.

It can be written as a sum of positive squares in 2 ways, for example, as 201366690121 + 10754312209 = 448739^2 + 103703^2 .

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

It is a super-3 number, since 3×212121002330³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212121002299 and 212121002308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10606050107 + ... + 10606050126.

Almost surely, 2^212121002330 is an apocalyptic number.

212121002330 is a deficient number, since it is larger than the sum of its proper divisors (169696801882).

212121002330 is a wasteful number, since it uses less digits than its factorization.

212121002330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21212100240.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212121002330 its reverse (33200121212), we get a palindrome (245321123542).

The spelling of 212121002330 in words is "two hundred twelve billion, one hundred twenty-one million, two thousand, three hundred thirty".