21313113300 has 216 divisors, whose sum is σ = 70856298240. Its totient is φ = 5346950400.

The previous prime is 21313113281. The next prime is 21313113301. The reversal of 21313113300 is 331131312.

It is a happy number.

21313113300 is a `hidden beast` number, since 21 + 3 + 1 + 311 + 330 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313113301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1254261 + ... + 1271139.

Almost surely, 2^21313113300 is an apocalyptic number.

21313113300 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 21313113300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35428149120).

21313113300 is an abundant number, since it is smaller than the sum of its proper divisors (49543184940).

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

21313113300 is a wasteful number, since it uses less digits than its factorization.

21313113300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16983 (or 16973 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21313113300 its reverse (331131312), we get a palindrome (21644244612).

The spelling of 21313113300 in words is "twenty-one billion, three hundred thirteen million, one hundred thirteen thousand, three hundred".