21131131132200 has 384 divisors, whose sum is σ = 67156851686400. Its totient is φ = 5494415646720.

The previous prime is 21131131132187. The next prime is 21131131132211. The reversal of 21131131132200 is 223113113112.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4493115049 + ... + 4493119751.

It is an arithmetic number, because the mean of its divisors is an integer number (174887634600).

Almost surely, 2^{21131131132200} is an apocalyptic number.

21131131132200 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 21131131132200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33578425843200).

21131131132200 is an abundant number, since it is smaller than the sum of its proper divisors (46025720554200).

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

21131131132200 is a wasteful number, since it uses less digits than its factorization.

21131131132200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621 (or 5612 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21131131132200 its reverse (223113113112), we get a palindrome (21354244245312).

The spelling of 21131131132200 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred".