1231120000000 has 352 divisors, whose sum is σ = 3358350777600. Its totient is φ = 447360000000.

The previous prime is 1231119999971. The next prime is 1231120000013. The reversal of 1231120000000 is 211321.

It is a tau number, because it is divible by the number of its divisors (352).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 879999301 + ... + 880000699.

Almost surely, 2^{1231120000000} is an apocalyptic number.

1231120000000 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 1231120000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679175388800).

1231120000000 is an abundant number, since it is smaller than the sum of its proper divisors (2127230777600).

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

1231120000000 is an frugal number, since it uses more digits than its factorization.

1231120000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 1231120000000 its reverse (211321), we get a palindrome (1231120211321).

The spelling of 1231120000000 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million", and thus it is an aban number.