21012213440200 has 48 divisors (see below), whose sum is σ = 50977456966080. Its totient is φ = 8039455575360.

The previous prime is 21012213440173. The next prime is 21012213440249. The reversal of 21012213440200 is 204431221012.

It is a super-2 number, since 2×21012213440200² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2283931644 + ... + 2283940843.

It is an arithmetic number, because the mean of its divisors is an integer number (1062030353460).

Almost surely, 2^{21012213440200} is an apocalyptic number.

21012213440200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012213440200 is an abundant number, since it is smaller than the sum of its proper divisors (29965243525880).

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

21012213440200 is a wasteful number, since it uses less digits than its factorization.

21012213440200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4567872526 (or 4567872517 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21012213440200 its reverse (204431221012), we get a palindrome (21216644661212).

The spelling of 21012213440200 in words is "twenty-one trillion, twelve billion, two hundred thirteen million, four hundred forty thousand, two hundred".