1201112100000 has 216 divisors, whose sum is σ = 4269308113980. Its totient is φ = 320296320000.

The previous prime is 1201112099983. The next prime is 1201112100011. The reversal of 1201112100000 is 12111021.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 18560247696 + 1182551852304 = 136236^2 + 1087452^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 232716 + ... + 1567284.

Almost surely, 2^{1201112100000} is an apocalyptic number.

1201112100000 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 1201112100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134654056990).

1201112100000 is an abundant number, since it is smaller than the sum of its proper divisors (3068196013980).

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

1201112100000 is an equidigital number, since it uses as much as digits as its factorization.

1201112100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334610 (or 1334579 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201112100000 its reverse (12111021), we get a palindrome (1201124211021).

The spelling of 1201112100000 in words is "one trillion, two hundred one billion, one hundred twelve million, one hundred thousand".