21100202021112 has 32 divisors (see below), whose sum is σ = 53977260986880. Its totient is φ = 6869833215840.

The previous prime is 21100202021099. The next prime is 21100202021141. The reversal of 21100202021112 is 21112020200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100202021091 and 21100202021100.

It is a congruent 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, 10222965064 + ... + 10222967127.

It is an arithmetic number, because the mean of its divisors is an integer number (1686789405840).

Almost surely, 2^{21100202021112} is an apocalyptic number.

It is an amenable number.

21100202021112 is an abundant number, since it is smaller than the sum of its proper divisors (32877058965768).

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

21100202021112 is a wasteful number, since it uses less digits than its factorization.

21100202021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20445932243 (or 20445932239 counting only the distinct ones).

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

Adding to 21100202021112 its reverse (21112020200112), we get a palindrome (42212222221224).

The spelling of 21100202021112 in words is "twenty-one trillion, one hundred billion, two hundred two million, twenty-one thousand, one hundred twelve".