21030221212300 has 36 divisors (see below), whose sum is σ = 45637500169296. Its totient is φ = 8411734542400.

The previous prime is 21030221212271. The next prime is 21030221212309. The reversal of 21030221212300 is 321212203012.

It is not an unprimeable number, because it can be changed into a prime (21030221212309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2029267 + ... + 6795466.

It is an arithmetic number, because the mean of its divisors is an integer number (1267708338036).

Almost surely, 2^{21030221212300} is an apocalyptic number.

21030221212300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030221212300 is an abundant number, since it is smaller than the sum of its proper divisors (24607278956996).

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

21030221212300 is a wasteful number, since it uses less digits than its factorization.

21030221212300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8848578 (or 8848571 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21030221212300 its reverse (321212203012), we get a palindrome (21351433415312).

The spelling of 21030221212300 in words is "twenty-one trillion, thirty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred".