12311110020 has 192 divisors, whose sum is σ = 38381930496. Its totient is φ = 2923499520.

The previous prime is 12311110001. The next prime is 12311110027. The reversal of 12311110020 is 2001111321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12311109978 and 12311110005.

It is not an unprimeable number, because it can be changed into a prime (12311110027) 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, 6593127 + ... + 6594993.

It is an arithmetic number, because the mean of its divisors is an integer number (199905888).

Almost surely, 2^12311110020 is an apocalyptic number.

12311110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19190965248).

12311110020 is an abundant number, since it is smaller than the sum of its proper divisors (26070820476).

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

12311110020 is a wasteful number, since it uses less digits than its factorization.

12311110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 2088 counting only the distinct ones).

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

Adding to 12311110020 its reverse (2001111321), we get a palindrome (14312221341).

The spelling of 12311110020 in words is "twelve billion, three hundred eleven million, one hundred ten thousand, twenty".