21013022200 has 24 divisors (see below), whose sum is σ = 48855277080. Its totient is φ = 8405208800.

The previous prime is 21013022183. The next prime is 21013022273. The reversal of 21013022200 is 222031012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52532356 + ... + 52532755.

It is an arithmetic number, because the mean of its divisors is an integer number (2035636545).

Almost surely, 2^21013022200 is an apocalyptic number.

21013022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013022200 is an abundant number, since it is smaller than the sum of its proper divisors (27842254880).

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

21013022200 is a wasteful number, since it uses less digits than its factorization.

21013022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105065127 (or 105065118 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21013022200 its reverse (222031012), we get a palindrome (21235053212).

The spelling of 21013022200 in words is "twenty-one billion, thirteen million, twenty-two thousand, two hundred".