20111121130 has 16 divisors (see below), whose sum is σ = 36695910024. Its totient is φ = 7934250240.

The previous prime is 20111121103. The next prime is 20111121139. The reversal of 20111121130 is 3112111102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14944818001 + 5166303129 = 122249^2 + 71877^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20111121130.

It is not an unprimeable number, because it can be changed into a prime (20111121139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13774011 + ... + 13775470.

Almost surely, 2^20111121130 is an apocalyptic number.

20111121130 is a deficient number, since it is larger than the sum of its proper divisors (16584788894).

20111121130 is a wasteful number, since it uses less digits than its factorization.

20111121130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27549561.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20111121130 its reverse (3112111102), we get a palindrome (23223232232).

The spelling of 20111121130 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred thirty".