21210210312300 has 288 divisors, whose sum is σ = 69712237089600. Its totient is φ = 5600049696000.

The previous prime is 21210210312251. The next prime is 21210210312353. The reversal of 21210210312300 is 321301201212.

21210210312300 is a `hidden beast` number, since 2 + 121 + 0 + 210 + 31 + 2 + 300 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21608586 + ... + 22568814.

Almost surely, 2^{21210210312300} is an apocalyptic number.

21210210312300 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 21210210312300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34856118544800).

21210210312300 is an abundant number, since it is smaller than the sum of its proper divisors (48502026777300).

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

21210210312300 is a wasteful number, since it uses less digits than its factorization.

21210210312300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960365 (or 960340 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21210210312300 its reverse (321301201212), we get a palindrome (21531511513512).

The spelling of 21210210312300 in words is "twenty-one trillion, two hundred ten billion, two hundred ten million, three hundred twelve thousand, three hundred".