1231011120000 has 320 divisors, whose sum is σ = 4123607835600. Its totient is φ = 325251072000.

The previous prime is 1231011119969. The next prime is 1231011120013. The reversal of 1231011120000 is 211101321.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26136472 + ... + 26183528.

Almost surely, 2^{1231011120000} is an apocalyptic number.

1231011120000 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 1231011120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061803917800).

1231011120000 is an abundant number, since it is smaller than the sum of its proper divisors (2892596715600).

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

1231011120000 is an equidigital number, since it uses as much as digits as its factorization.

1231011120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47203 (or 47176 counting only the distinct ones).

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

Adding to 1231011120000 its reverse (211101321), we get a palindrome (1231222221321).

The spelling of 1231011120000 in words is "one trillion, two hundred thirty-one billion, eleven million, one hundred twenty thousand".