1213311120000 has 640 divisors, whose sum is σ = 4844979110400. Its totient is φ = 262725120000.

The previous prime is 1213311119843. The next prime is 1213311120013. The reversal of 1213311120000 is 211133121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 31900995 + ... + 31939005.

It is an arithmetic number, because the mean of its divisors is an integer number (7570279860).

Almost surely, 2^{1213311120000} is an apocalyptic number.

1213311120000 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 1213311120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2422489555200).

1213311120000 is an abundant number, since it is smaller than the sum of its proper divisors (3631667990400).

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

1213311120000 is an equidigital number, since it uses as much as digits as its factorization.

1213311120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38074 (or 38047 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1213311120000 its reverse (211133121), we get a palindrome (1213522253121).

The spelling of 1213311120000 in words is "one trillion, two hundred thirteen billion, three hundred eleven million, one hundred twenty thousand".