21211000120200 has 96 divisors (see below), whose sum is σ = 71731745883360. Its totient is φ = 5142060633600.

The previous prime is 21211000120171. The next prime is 21211000120229. The reversal of 21211000120200 is 202100011212.

It is an interprime number because it is at equal distance from previous prime (21211000120171) and next prime (21211000120229).

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, 1606887349 + ... + 1606900548.

It is an arithmetic number, because the mean of its divisors is an integer number (747205686285).

Almost surely, 2^{21211000120200} is an apocalyptic number.

21211000120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211000120200 is an abundant number, since it is smaller than the sum of its proper divisors (50520745763160).

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

21211000120200 is a wasteful number, since it uses less digits than its factorization.

21211000120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213787927 (or 3213787918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211000120200 its reverse (202100011212), we get a palindrome (21413100131412).

The spelling of 21211000120200 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty thousand, two hundred".