21001112110122 has 16 divisors (see below), whose sum is σ = 42003092920320. Its totient is φ = 7000225920032.

The previous prime is 21001112110091. The next prime is 21001112110141. The reversal of 21001112110122 is 22101121110012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35881347 + ... + 36461942.

It is an arithmetic number, because the mean of its divisors is an integer number (2625193307520).

Almost surely, 2^{21001112110122} is an apocalyptic number.

21001112110122 is an abundant number, since it is smaller than the sum of its proper divisors (21001980810198).

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

21001112110122 is a wasteful number, since it uses less digits than its factorization.

21001112110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72391677.

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

Adding to 21001112110122 its reverse (22101121110012), we get a palindrome (43102233220134).

The spelling of 21001112110122 in words is "twenty-one trillion, one billion, one hundred twelve million, one hundred ten thousand, one hundred twenty-two".