1323212111100 has 432 divisors, whose sum is σ = 4559588167680. Its totient is φ = 318306240000.

The previous prime is 1323212111077. The next prime is 1323212111153. The reversal of 1323212111100 is 11112123231.

1323212111100 is a `hidden beast` number, since 1 + 32 + 321 + 211 + 1 + 100 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1193157346 + ... + 1193158454.

It is an arithmetic number, because the mean of its divisors is an integer number (10554602240).

Almost surely, 2^{1323212111100} is an apocalyptic number.

1323212111100 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 1323212111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279794083840).

1323212111100 is an abundant number, since it is smaller than the sum of its proper divisors (3236376056580).

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

1323212111100 is a wasteful number, since it uses less digits than its factorization.

1323212111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1323212111100 its reverse (11112123231), we get a palindrome (1334324234331).

The spelling of 1323212111100 in words is "one trillion, three hundred twenty-three billion, two hundred twelve million, one hundred eleven thousand, one hundred".