21201101112 has 64 divisors (see below), whose sum is σ = 53242272000. Its totient is φ = 7035176960.

The previous prime is 21201101111. The next prime is 21201101143. The reversal of 21201101112 is 21110110212.

It is a super-2 number, since 2×21201101112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201101111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5289013 + ... + 5293019.

It is an arithmetic number, because the mean of its divisors is an integer number (831910500).

Almost surely, 2^21201101112 is an apocalyptic number.

It is an amenable number.

21201101112 is an abundant number, since it is smaller than the sum of its proper divisors (32041170888).

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

21201101112 is a wasteful number, since it uses less digits than its factorization.

21201101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956 (or 4952 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21201101112 its reverse (21110110212), we get a palindrome (42311211324).

The spelling of 21201101112 in words is "twenty-one billion, two hundred one million, one hundred one thousand, one hundred twelve".