21210212110112 has 24 divisors (see below), whose sum is σ = 41823782001792. Its totient is φ = 10588299220800.

The previous prime is 21210212110111. The next prime is 21210212110117. The reversal of 21210212110112 is 21101121201212.

It is a super-4 number, since 4×21210212110112⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21210212110111) 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, 525193064 + ... + 525233447.

It is an arithmetic number, because the mean of its divisors is an integer number (1742657583408).

Almost surely, 2^{21210212110112} is an apocalyptic number.

It is an amenable number.

21210212110112 is a deficient number, since it is larger than the sum of its proper divisors (20613569891680).

21210212110112 is a wasteful number, since it uses less digits than its factorization.

21210212110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050427152 (or 1050427144 counting only the distinct ones).

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

Adding to 21210212110112 its reverse (21101121201212), we get a palindrome (42311333311324).

The spelling of 21210212110112 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, one hundred ten thousand, one hundred twelve".