21003113231200 has 288 divisors, whose sum is σ = 53218453800960. Its totient is φ = 8089200537600.

The previous prime is 21003113231183. The next prime is 21003113231227. The reversal of 21003113231200 is 213231130012.

It is a super-2 number, since 2×21003113231200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 834669819 + ... + 834694981.

It is an arithmetic number, because the mean of its divisors is an integer number (184786297920).

Almost surely, 2^{21003113231200} is an apocalyptic number.

21003113231200 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 21003113231200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26609226900480).

21003113231200 is an abundant number, since it is smaller than the sum of its proper divisors (32215340569760).

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

21003113231200 is a wasteful number, since it uses less digits than its factorization.

21003113231200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25590 (or 25577 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21003113231200 its reverse (213231130012), we get a palindrome (21216344361212).

The spelling of 21003113231200 in words is "twenty-one trillion, three billion, one hundred thirteen million, two hundred thirty-one thousand, two hundred".