21010110221112 has 64 divisors (see below), whose sum is σ = 55617534312480. Its totient is φ = 6591106486272.

The previous prime is 21010110221083. The next prime is 21010110221141. The reversal of 21010110221112 is 21112201101012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21010110221083) and next prime (21010110221141).

It is a junction number, because it is equal to n+sod(n) for n = 21010110221091 and 21010110221100.

It is a congruent number.

It is an unprimeable number.

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, 7866948 + ... + 10193580.

Almost surely, 2^{21010110221112} is an apocalyptic number.

It is an amenable number.

21010110221112 is an abundant number, since it is smaller than the sum of its proper divisors (34607424091368).

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

21010110221112 is a wasteful number, since it uses less digits than its factorization.

21010110221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348792 (or 2348788 counting only the distinct ones).

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

Adding to 21010110221112 its reverse (21112201101012), we get a palindrome (42122311322124).

The spelling of 21010110221112 in words is "twenty-one trillion, ten billion, one hundred ten million, two hundred twenty-one thousand, one hundred twelve".