21100002122112 has 32 divisors (see below), whose sum is σ = 56046880637880. Its totient is φ = 7033334040576.

The previous prime is 21100002122093. The next prime is 21100002122119. The reversal of 21100002122112 is 21122120000112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 21100002122091 and 21100002122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100002122119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27473960713 + ... + 27473961480.

Almost surely, 2^{21100002122112} is an apocalyptic number.

It is an amenable number.

21100002122112 is an abundant number, since it is smaller than the sum of its proper divisors (34946878515768).

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

21100002122112 is an equidigital number, since it uses as much as digits as its factorization.

21100002122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54947922210 (or 54947922198 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100002122112 its reverse (21122120000112), we get a palindrome (42222122122224).

The spelling of 21100002122112 in words is "twenty-one trillion, one hundred billion, two million, one hundred twenty-two thousand, one hundred twelve".