21112101201200 has 120 divisors (see below), whose sum is σ = 50949709375968. Its totient is φ = 8406913546240.

The previous prime is 21112101201187. The next prime is 21112101201221. The reversal of 21112101201200 is 210210121112.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532804589 + ... + 532844211.

Almost surely, 2^{21112101201200} is an apocalyptic number.

21112101201200 is a gapful number since it is divisible by the number (20) 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 21112101201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25474854687984).

21112101201200 is an abundant number, since it is smaller than the sum of its proper divisors (29837608174768).

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

21112101201200 is a wasteful number, since it uses less digits than its factorization.

21112101201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45591 (or 45580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112101201200 its reverse (210210121112), we get a palindrome (21322311322312).

The spelling of 21112101201200 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two hundred one thousand, two hundred".