21033321021300 has 72 divisors (see below), whose sum is σ = 69550181517376. Its totient is φ = 4807616232960.

The previous prime is 21033321021241. The next prime is 21033321021329. The reversal of 21033321021300 is 312012333012.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 5007931477 + ... + 5007935676.

Almost surely, 2^{21033321021300} is an apocalyptic number.

21033321021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033321021300 is an abundant number, since it is smaller than the sum of its proper divisors (48516860496076).

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

21033321021300 is a wasteful number, since it uses less digits than its factorization.

21033321021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10015867177 (or 10015867170 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21033321021300 its reverse (312012333012), we get a palindrome (21345333354312).

The spelling of 21033321021300 in words is "twenty-one trillion, thirty-three billion, three hundred twenty-one million, twenty-one thousand, three hundred".