21112110100012 has 24 divisors (see below), whose sum is σ = 36962118411120. Its totient is φ = 10551505236480.

The previous prime is 21112110099991. The next prime is 21112110100033. The reversal of 21112110100012 is 21000101121112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21112110099991) and next prime (21112110100033).

It is a junction number, because it is equal to n+sod(n) for n = 21112110099965 and 21112110100001.

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, 320425312 + ... + 320491192.

It is an arithmetic number, because the mean of its divisors is an integer number (1540088267130).

Almost surely, 2^{21112110100012} is an apocalyptic number.

It is an amenable number.

21112110100012 is a deficient number, since it is larger than the sum of its proper divisors (15850008311108).

21112110100012 is a wasteful number, since it uses less digits than its factorization.

21112110100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99201 (or 99199 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21112110100012 its reverse (21000101121112), we get a palindrome (42112211221124).

The spelling of 21112110100012 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, one hundred thousand, twelve".