20111223130 has 16 divisors (see below), whose sum is σ = 36400206024. Its totient is φ = 8000043840.

The previous prime is 20111223101. The next prime is 20111223133. The reversal of 20111223130 is 3132211102.

It can be written as a sum of positive squares in 4 ways, for example, as 11495485089 + 8615738041 = 107217^2 + 92821^2 .

It is a super-2 number, since 2×20111223130² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20111223133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5553777 + ... + 5557396.

Almost surely, 2^20111223130 is an apocalyptic number.

20111223130 is a deficient number, since it is larger than the sum of its proper divisors (16288982894).

20111223130 is a wasteful number, since it uses less digits than its factorization.

20111223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111361.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20111223130 its reverse (3132211102), we get a palindrome (23243434232).

The spelling of 20111223130 in words is "twenty billion, one hundred eleven million, two hundred twenty-three thousand, one hundred thirty".