21020102223300 has 108 divisors (see below), whose sum is σ = 67667054705796. Its totient is φ = 5453864352000.

The previous prime is 21020102223277. The next prime is 21020102223311. The reversal of 21020102223300 is 332220102012.

21020102223300 is a `hidden beast` number, since 2 + 102 + 0 + 10 + 222 + 330 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1876467104964 + 19143635118336 = 1369842^2 + 4375344^2 .

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 35 ways as a sum of consecutive naturals, for example, 315583851 + ... + 315650450.

Almost surely, 2^{21020102223300} is an apocalyptic number.

21020102223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020102223300 is an abundant number, since it is smaller than the sum of its proper divisors (46646952482496).

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

21020102223300 is a wasteful number, since it uses less digits than its factorization.

21020102223300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631234358 (or 631234348 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21020102223300 its reverse (332220102012), we get a palindrome (21352322325312).

The spelling of 21020102223300 in words is "twenty-one trillion, twenty billion, one hundred two million, two hundred twenty-three thousand, three hundred".