12311231100020 has 48 divisors (see below), whose sum is σ = 27217327347840. Its totient is φ = 4664789709696.

The previous prime is 12311231100011. The next prime is 12311231100067. The reversal of 12311231100020 is 2000113211321.

It is a super-2 number, since 2×12311231100020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627649 + ... + 5222231.

It is an arithmetic number, because the mean of its divisors is an integer number (567027653080).

Almost surely, 2^{12311231100020} is an apocalyptic number.

12311231100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311231100020 is an abundant number, since it is smaller than the sum of its proper divisors (14906096247820).

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

12311231100020 is a wasteful number, since it uses less digits than its factorization.

12311231100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603624 (or 3603622 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12311231100020 its reverse (2000113211321), we get a palindrome (14311344311341).

The spelling of 12311231100020 in words is "twelve trillion, three hundred eleven billion, two hundred thirty-one million, one hundred thousand, twenty".