21134002100 has 72 divisors (see below), whose sum is σ = 48440545440. Its totient is φ = 7981130880.

The previous prime is 21134002067. The next prime is 21134002177. The reversal of 21134002100 is 120043112.

It is a congruent number.

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, 537719 + ... + 575681.

Almost surely, 2^21134002100 is an apocalyptic number.

21134002100 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 21134002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24220272720).

21134002100 is an abundant number, since it is smaller than the sum of its proper divisors (27306543340).

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

21134002100 is a wasteful number, since it uses less digits than its factorization.

21134002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38289 (or 38282 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21134002100 its reverse (120043112), we get a palindrome (21254045212).

The spelling of 21134002100 in words is "twenty-one billion, one hundred thirty-four million, two thousand, one hundred".