21213301132100 has 108 divisors (see below), whose sum is σ = 58416472512720. Its totient is φ = 6611937998400.

The previous prime is 21213301132099. The next prime is 21213301132109. The reversal of 21213301132100 is 123110331212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21213301132109) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 196729970 + ... + 196837769.

Almost surely, 2^{21213301132100} is an apocalyptic number.

21213301132100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213301132100 is an abundant number, since it is smaller than the sum of its proper divisors (37203171380620).

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

21213301132100 is a wasteful number, since it uses less digits than its factorization.

21213301132100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393567778 (or 393567764 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21213301132100 its reverse (123110331212), we get a palindrome (21336411463312).

The spelling of 21213301132100 in words is "twenty-one trillion, two hundred thirteen billion, three hundred one million, one hundred thirty-two thousand, one hundred".