21112112100102 has 8 divisors (see below), whose sum is σ = 42224224200216. Its totient is φ = 7037370700032.

The previous prime is 21112112100089. The next prime is 21112112100103. The reversal of 21112112100102 is 20100121121112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21112112100102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112112100103) 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, 1759342675003 + ... + 1759342675014.

It is an arithmetic number, because the mean of its divisors is an integer number (5278028025027).

Almost surely, 2^{21112112100102} is an apocalyptic number.

21112112100102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21112112100102 is a wasteful number, since it uses less digits than its factorization.

21112112100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518685350022.

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

Adding to 21112112100102 its reverse (20100121121112), we get a palindrome (41212233221214).

The spelling of 21112112100102 in words is "twenty-one trillion, one hundred twelve billion, one hundred twelve million, one hundred thousand, one hundred two".