12311402020 has 24 divisors (see below), whose sum is σ = 25857304704. Its totient is φ = 4923920736.

The previous prime is 12311402017. The next prime is 12311402021. The reversal of 12311402020 is 2020411321.

It is a junction number, because it is equal to n+sod(n) for n = 12311401985 and 12311402003.

It is not an unprimeable number, because it can be changed into a prime (12311402021) 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, 136767 + ... + 208153.

It is an arithmetic number, because the mean of its divisors is an integer number (1077387696).

Almost surely, 2^12311402020 is an apocalyptic number.

12311402020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311402020 is an abundant number, since it is smaller than the sum of its proper divisors (13545902684).

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

12311402020 is a wasteful number, since it uses less digits than its factorization.

12311402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80019 (or 80017 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12311402020 its reverse (2020411321), we get a palindrome (14331813341).

The spelling of 12311402020 in words is "twelve billion, three hundred eleven million, four hundred two thousand, twenty".