20011110120 has 96 divisors (see below), whose sum is σ = 67278767400. Its totient is φ = 5152283136.

The previous prime is 20011110113. The next prime is 20011110121. The reversal of 20011110120 is 2101111002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14037984324 + 5973125796 = 118482^2 + 77286^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20011110121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 947947 + ... + 968826.

Almost surely, 2^20011110120 is an apocalyptic number.

20011110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011110120 is an abundant number, since it is smaller than the sum of its proper divisors (47267657280).

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

20011110120 is a wasteful number, since it uses less digits than its factorization.

20011110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916819 (or 1916812 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20011110120 its reverse (2101111002), we get a palindrome (22112221122).

The spelling of 20011110120 in words is "twenty billion, eleven million, one hundred ten thousand, one hundred twenty".