1213111323000 has 320 divisors, whose sum is σ = 4280159426400. Its totient is φ = 320470732800.

The previous prime is 1213111322989. The next prime is 1213111323007. The reversal of 1213111323000 is 3231113121.

1213111323000 is a `hidden beast` number, since 1 + 21 + 311 + 1 + 32 + 300 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213111323007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8597016 + ... + 8736984.

Almost surely, 2^{1213111323000} is an apocalyptic number.

1213111323000 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 1213111323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140079713200).

1213111323000 is an abundant number, since it is smaller than the sum of its proper divisors (3067048103400).

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

1213111323000 is a wasteful number, since it uses less digits than its factorization.

1213111323000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140109 (or 140086 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1213111323000 its reverse (3231113121), we get a palindrome (1216342436121).

The spelling of 1213111323000 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, three hundred twenty-three thousand".