20121212130 has 64 divisors (see below), whose sum is σ = 50582568960. Its totient is φ = 5112806336.

The previous prime is 20121212117. The next prime is 20121212171. The reversal of 20121212130 is 3121212102.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 31 ways as a sum of consecutive naturals, for example, 126031 + ... + 236909.

It is an arithmetic number, because the mean of its divisors is an integer number (790352640).

Almost surely, 2^20121212130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20121212130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25291284480).

20121212130 is an abundant number, since it is smaller than the sum of its proper divisors (30461356830).

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

20121212130 is a wasteful number, since it uses less digits than its factorization.

20121212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111175.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20121212130 its reverse (3121212102), we get a palindrome (23242424232).

The spelling of 20121212130 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty".