21100303131100 has 36 divisors (see below), whose sum is σ = 45869861969064. Its totient is φ = 8424968409280.

The previous prime is 21100303131077. The next prime is 21100303131107. The reversal of 21100303131100 is 113130300112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100303131107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189354562 + ... + 189465961.

It is an arithmetic number, because the mean of its divisors is an integer number (1274162832474).

Almost surely, 2^{21100303131100} is an apocalyptic number.

21100303131100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100303131100 is an abundant number, since it is smaller than the sum of its proper divisors (24769558837964).

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

21100303131100 is a wasteful number, since it uses less digits than its factorization.

21100303131100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378821094 (or 378821087 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21100303131100 its reverse (113130300112), we get a palindrome (21213433431212).

The spelling of 21100303131100 in words is "twenty-one trillion, one hundred billion, three hundred three million, one hundred thirty-one thousand, one hundred".