20111123130 has 32 divisors (see below), whose sum is σ = 55161938304. Its totient is φ = 4596828096.

The previous prime is 20111123119. The next prime is 20111123143. The reversal of 20111123130 is 3132111102.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47883417 + ... + 47883836.

It is an arithmetic number, because the mean of its divisors is an integer number (1723810572).

Almost surely, 2^20111123130 is an apocalyptic number.

20111123130 is an abundant number, since it is smaller than the sum of its proper divisors (35050815174).

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

20111123130 is a wasteful number, since it uses less digits than its factorization.

20111123130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95767270.

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

Adding to 20111123130 its reverse (3132111102), we get a palindrome (23243234232).

The spelling of 20111123130 in words is "twenty billion, one hundred eleven million, one hundred twenty-three thousand, one hundred thirty".