21203323120100 has 36 divisors (see below), whose sum is σ = 50194048552368. Its totient is φ = 7710299316000.

The previous prime is 21203323120099. The next prime is 21203323120139. The reversal of 21203323120100 is 102132330212.

It is a super-2 number, since 2×21203323120100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9637873046 + ... + 9637875245.

Almost surely, 2^{21203323120100} is an apocalyptic number.

21203323120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203323120100 is an abundant number, since it is smaller than the sum of its proper divisors (28990725432268).

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

21203323120100 is a wasteful number, since it uses less digits than its factorization.

21203323120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19275748316 (or 19275748309 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21203323120100 its reverse (102132330212), we get a palindrome (21305455450312).

The spelling of 21203323120100 in words is "twenty-one trillion, two hundred three billion, three hundred twenty-three million, one hundred twenty thousand, one hundred".