20121003320 has 64 divisors (see below), whose sum is σ = 49849603200. Its totient is φ = 7248330880.

The previous prime is 20121003311. The next prime is 20121003347. The reversal of 20121003320 is 2330012102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20121003295 and 20121003304.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 166610 + ... + 260769.

It is an arithmetic number, because the mean of its divisors is an integer number (778900050).

Almost surely, 2^20121003320 is an apocalyptic number.

20121003320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121003320 is an abundant number, since it is smaller than the sum of its proper divisors (29728599880).

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

20121003320 is a wasteful number, since it uses less digits than its factorization.

20121003320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427508 (or 427504 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20121003320 its reverse (2330012102), we get a palindrome (22451015422).

The spelling of 20121003320 in words is "twenty billion, one hundred twenty-one million, three thousand, three hundred twenty".