212120322330 has 96 divisors (see below), whose sum is σ = 617953463424. Its totient is φ = 46376609664.

The previous prime is 212120322319. The next prime is 212120322341. The reversal of 212120322330 is 33223021212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212120322319) and next prime (212120322341).

It is a super-2 number, since 2×212120322330² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 212120322297 and 212120322306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3103137 + ... + 3170756.

It is an arithmetic number, because the mean of its divisors is an integer number (6437015244).

Almost surely, 2^212120322330 is an apocalyptic number.

212120322330 is an abundant number, since it is smaller than the sum of its proper divisors (405833141094).

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

212120322330 is a wasteful number, since it uses less digits than its factorization.

212120322330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273940 (or 6273933 counting only the distinct ones).

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

Adding to 212120322330 its reverse (33223021212), we get a palindrome (245343343542).

The spelling of 212120322330 in words is "two hundred twelve billion, one hundred twenty million, three hundred twenty-two thousand, three hundred thirty".