21111201210200 has 48 divisors (see below), whose sum is σ = 49084785880080. Its totient is φ = 8444266623360.

The previous prime is 21111201210193. The next prime is 21111201210241. The reversal of 21111201210200 is 201210211112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6700814 + ... + 9333986.

It is an arithmetic number, because the mean of its divisors is an integer number (1022599705835).

Almost surely, 2^{21111201210200} is an apocalyptic number.

21111201210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111201210200 is an abundant number, since it is smaller than the sum of its proper divisors (27973584669880).

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

21111201210200 is a wasteful number, since it uses less digits than its factorization.

21111201210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673276 (or 2673267 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111201210200 its reverse (201210211112), we get a palindrome (21312411421312).

The spelling of 21111201210200 in words is "twenty-one trillion, one hundred eleven billion, two hundred one million, two hundred ten thousand, two hundred".