21110122010112 has 240 divisors, whose sum is σ = 60777289647360. Its totient is φ = 6498659098624.

The previous prime is 21110122010101. The next prime is 21110122010113. The reversal of 21110122010112 is 21101022101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110122010091 and 21110122010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110122010113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29355589 + ... + 30066107.

It is an arithmetic number, because the mean of its divisors is an integer number (253238706864).

Almost surely, 2^{21110122010112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110122010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30388644823680).

21110122010112 is an abundant number, since it is smaller than the sum of its proper divisors (39667167637248).

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

21110122010112 is an equidigital number, since it uses as much as digits as its factorization.

21110122010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710621 (or 710576 counting only the distinct ones).

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

Adding to 21110122010112 its reverse (21101022101112), we get a palindrome (42211144111224).

The spelling of 21110122010112 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-two million, ten thousand, one hundred twelve".