21220020201100 has 36 divisors (see below), whose sum is σ = 52625650100464. Its totient is φ = 7275435497280.

The previous prime is 21220020201053. The next prime is 21220020201151. The reversal of 21220020201100 is 110202002212.

It is a happy number.

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, 15157156587 + ... + 15157157986.

Almost surely, 2^{21220020201100} is an apocalyptic number.

21220020201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220020201100 is an abundant number, since it is smaller than the sum of its proper divisors (31405629899364).

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

21220020201100 is a wasteful number, since it uses less digits than its factorization.

21220020201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30314314594 (or 30314314587 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220020201100 its reverse (110202002212), we get a palindrome (21330222203312).

The spelling of 21220020201100 in words is "twenty-one trillion, two hundred twenty billion, twenty million, two hundred one thousand, one hundred".