20112121230 has 64 divisors (see below), whose sum is σ = 48963979008. Its totient is φ = 5286124800.

The previous prime is 20112121229. The next prime is 20112121241. The reversal of 20112121230 is 3212121102.

20112121230 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4962705 + ... + 4966755.

It is an arithmetic number, because the mean of its divisors is an integer number (765062172).

Almost surely, 2^20112121230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112121230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24481989504).

20112121230 is an abundant number, since it is smaller than the sum of its proper divisors (28851857778).

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

20112121230 is a wasteful number, since it uses less digits than its factorization.

20112121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401.

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

Adding to 20112121230 its reverse (3212121102), we get a palindrome (23324242332).

The spelling of 20112121230 in words is "twenty billion, one hundred twelve million, one hundred twenty-one thousand, two hundred thirty".