21202301100 has 72 divisors (see below), whose sum is σ = 61500192208. Its totient is φ = 5639673600.

The previous prime is 21202301093. The next prime is 21202301189. The reversal of 21202301100 is 110320212.

It is a super-2 number, since 2×21202301100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 30090 + ... + 208110.

Almost surely, 2^21202301100 is an apocalyptic number.

21202301100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202301100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30750096104).

21202301100 is an abundant number, since it is smaller than the sum of its proper divisors (40297891108).

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

21202301100 is a wasteful number, since it uses less digits than its factorization.

21202301100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178435 (or 178428 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21202301100 its reverse (110320212), we get a palindrome (21312621312).

The spelling of 21202301100 in words is "twenty-one billion, two hundred two million, three hundred one thousand, one hundred".