20113121130 has 128 divisors (see below), whose sum is σ = 50295168000. Its totient is φ = 5143756800.

The previous prime is 20113121087. The next prime is 20113121131. The reversal of 20113121130 is 3112131102.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20113121131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43629100 + ... + 43629560.

It is an arithmetic number, because the mean of its divisors is an integer number (392931000).

Almost surely, 2^20113121130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113121130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25147584000).

20113121130 is an abundant number, since it is smaller than the sum of its proper divisors (30182046870).

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

20113121130 is a wasteful number, since it uses less digits than its factorization.

20113121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20113121130 its reverse (3112131102), we get a palindrome (23225252232).

The spelling of 20113121130 in words is "twenty billion, one hundred thirteen million, one hundred twenty-one thousand, one hundred thirty".