21101112120212 has 12 divisors (see below), whose sum is σ = 36926983267776. Its totient is φ = 10550545472280.

The previous prime is 21101112120173. The next prime is 21101112120217. The reversal of 21101112120212 is 21202121110112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101112120217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3343637 + ... + 7306307.

It is an arithmetic number, because the mean of its divisors is an integer number (3077248605648).

Almost surely, 2^{21101112120212} is an apocalyptic number.

It is an amenable number.

21101112120212 is a deficient number, since it is larger than the sum of its proper divisors (15825871147564).

21101112120212 is a wasteful number, since it uses less digits than its factorization.

21101112120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293918 (or 5293916 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21101112120212 its reverse (21202121110112), we get a palindrome (42303233230324).

The spelling of 21101112120212 in words is "twenty-one trillion, one hundred one billion, one hundred twelve million, one hundred twenty thousand, two hundred twelve".