21200011101212 has 24 divisors (see below), whose sum is σ = 37467692382960. Its totient is φ = 10494958073600.

The previous prime is 21200011101209. The next prime is 21200011101289. The reversal of 21200011101212 is 21210111000212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65815364 + ... + 66136692.

It is an arithmetic number, because the mean of its divisors is an integer number (1561153849290).

Almost surely, 2^{21200011101212} is an apocalyptic number.

It is an amenable number.

21200011101212 is a deficient number, since it is larger than the sum of its proper divisors (16267681281748).

21200011101212 is a wasteful number, since it uses less digits than its factorization.

21200011101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484741 (or 484739 counting only the distinct ones).

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

Adding to 21200011101212 its reverse (21210111000212), we get a palindrome (42410122101424).

The spelling of 21200011101212 in words is "twenty-one trillion, two hundred billion, eleven million, one hundred one thousand, two hundred twelve".