21230223202100 has 108 divisors (see below), whose sum is σ = 52840141993632. Its totient is φ = 7384425364800.

The previous prime is 21230223202061. The next prime is 21230223202103. The reversal of 21230223202100 is 120232203212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230223202103) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37864394 + ... + 38420993.

Almost surely, 2^{21230223202100} is an apocalyptic number.

21230223202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230223202100 is an abundant number, since it is smaller than the sum of its proper divisors (31609918791532).

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

21230223202100 is a wasteful number, since it uses less digits than its factorization.

21230223202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76285446 (or 76285428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21230223202100 its reverse (120232203212), we get a palindrome (21350455405312).

The spelling of 21230223202100 in words is "twenty-one trillion, two hundred thirty billion, two hundred twenty-three million, two hundred two thousand, one hundred".