21101022101112 has 64 divisors (see below), whose sum is σ = 52788456864000. Its totient is φ = 7028888342784.

The previous prime is 21101022101099. The next prime is 21101022101113. The reversal of 21101022101112 is 21110122010112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21101022101091 and 21101022101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101022101113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322223589 + ... + 322289067.

It is an arithmetic number, because the mean of its divisors is an integer number (824819638500).

Almost surely, 2^{21101022101112} is an apocalyptic number.

It is an amenable number.

21101022101112 is an abundant number, since it is smaller than the sum of its proper divisors (31687434762888).

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

21101022101112 is a wasteful number, since it uses less digits than its factorization.

21101022101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74420 (or 74416 counting only the distinct ones).

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

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

The spelling of 21101022101112 in words is "twenty-one trillion, one hundred one billion, twenty-two million, one hundred one thousand, one hundred twelve".