21210212001200 has 30 divisors (see below), whose sum is σ = 50957534333844. Its totient is φ = 8484084800320.

The previous prime is 21210212001197. The next prime is 21210212001203. The reversal of 21210212001200 is 210021201212.

It is an interprime number because it is at equal distance from previous prime (21210212001197) and next prime (21210212001203).

It is not an unprimeable number, because it can be changed into a prime (21210212001203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26512764602 + ... + 26512765401.

Almost surely, 2^{21210212001200} is an apocalyptic number.

21210212001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210212001200 is an abundant number, since it is smaller than the sum of its proper divisors (29747322332644).

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

21210212001200 is a wasteful number, since it uses less digits than its factorization.

21210212001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53025530021 (or 53025530010 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210212001200 its reverse (210021201212), we get a palindrome (21420233202412).

The spelling of 21210212001200 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, one thousand, two hundred".