21000122210200 has 48 divisors (see below), whose sum is σ = 55800324733680. Its totient is φ = 7200041900160.

The previous prime is 21000122210183. The next prime is 21000122210267. The reversal of 21000122210200 is 201222100012.

It is a happy number.

It is a congruent 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, 7500042247 + ... + 7500045046.

It is an arithmetic number, because the mean of its divisors is an integer number (1162506765285).

Almost surely, 2^{21000122210200} is an apocalyptic number.

21000122210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000122210200 is an abundant number, since it is smaller than the sum of its proper divisors (34800202523480).

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

21000122210200 is a wasteful number, since it uses less digits than its factorization.

21000122210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000087316 (or 15000087307 counting only the distinct ones).

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

Adding to 21000122210200 its reverse (201222100012), we get a palindrome (21201344310212).

The spelling of 21000122210200 in words is "twenty-one trillion, one hundred twenty-two million, two hundred ten thousand, two hundred".