21211112010112 has 32 divisors (see below), whose sum is σ = 42264226054800. Its totient is φ = 10603619980800.

The previous prime is 21211112010083. The next prime is 21211112010113. The reversal of 21211112010112 is 21101021111212.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×21211112010112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211112010113) 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, 14421139 + ... + 15823762.

Almost surely, 2^{21211112010112} is an apocalyptic number.

It is an amenable number.

21211112010112 is a deficient number, since it is larger than the sum of its proper divisors (21053114044688).

21211112010112 is an equidigital number, since it uses as much as digits as its factorization.

21211112010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30250394 (or 30250382 counting only the distinct ones).

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

Adding to 21211112010112 its reverse (21101021111212), we get a palindrome (42312133121324).

The spelling of 21211112010112 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, ten thousand, one hundred twelve".