1200111231000 has 256 divisors, whose sum is σ = 4299730905600. Its totient is φ = 275623488000.

The previous prime is 1200111230993. The next prime is 1200111231023. The reversal of 1200111231000 is 1321110021.

It is a super-2 number, since 2×1200111231000² (a number of 25 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 330027 + ... + 1584026.

It is an arithmetic number, because the mean of its divisors is an integer number (16795823850).

Almost surely, 2^{1200111231000} is an apocalyptic number.

1200111231000 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 1200111231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149865452800).

1200111231000 is an abundant number, since it is smaller than the sum of its proper divisors (3099619674600).

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

1200111231000 is a wasteful number, since it uses less digits than its factorization.

1200111231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914107 (or 1914093 counting only the distinct ones).

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

Adding to 1200111231000 its reverse (1321110021), we get a palindrome (1201432341021).

The spelling of 1200111231000 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred thirty-one thousand".