21112001112012 has 24 divisors (see below), whose sum is σ = 49344407337456. Its totient is φ = 7025466359808.

The previous prime is 21112001111989. The next prime is 21112001112061. The reversal of 21112001112012 is 21021110021112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21112001111982 and 21112001112000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483410613 + ... + 1483424844.

It is an arithmetic number, because the mean of its divisors is an integer number (2056016972394).

Almost surely, 2^{21112001112012} is an apocalyptic number.

It is an amenable number.

21112001112012 is an abundant number, since it is smaller than the sum of its proper divisors (28232406225444).

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

21112001112012 is a wasteful number, since it uses less digits than its factorization.

21112001112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966836057 (or 2966836055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112001112012 its reverse (21021110021112), we get a palindrome (42133111133124).

The spelling of 21112001112012 in words is "twenty-one trillion, one hundred twelve billion, one million, one hundred twelve thousand, twelve".