1213113112200 has 432 divisors, whose sum is σ = 4551535961700. Its totient is φ = 289263744000.

The previous prime is 1213113112181. The next prime is 1213113112243. The reversal of 1213113112200 is 22113113121.

1213113112200 is a `hidden beast` number, since 1 + 2 + 131 + 1 + 311 + 220 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 158911236 + 1212954200964 = 12606^2 + 1101342^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 13240146 + ... + 13331454.

Almost surely, 2^{1213113112200} is an apocalyptic number.

1213113112200 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 1213113112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2275767980850).

1213113112200 is an abundant number, since it is smaller than the sum of its proper divisors (3338422849500).

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

1213113112200 is a wasteful number, since it uses less digits than its factorization.

1213113112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91414 (or 91391 counting only the distinct ones).

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

Adding to 1213113112200 its reverse (22113113121), we get a palindrome (1235226225321).

The spelling of 1213113112200 in words is "one trillion, two hundred thirteen billion, one hundred thirteen million, one hundred twelve thousand, two hundred".