21211101020112 has 40 divisors (see below), whose sum is σ = 54798827754720. Its totient is φ = 7069917528960.

The previous prime is 21211101020107. The next prime is 21211101020149. The reversal of 21211101020112 is 21102010111212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21211101020091 and 21211101020100.

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, 13282839 + ... + 14793782.

It is an arithmetic number, because the mean of its divisors is an integer number (1369970693868).

Almost surely, 2^{21211101020112} is an apocalyptic number.

It is an amenable number.

21211101020112 is an abundant number, since it is smaller than the sum of its proper divisors (33587726734608).

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

21211101020112 is a wasteful number, since it uses less digits than its factorization.

21211101020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28092371 (or 28092365 counting only the distinct ones).

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

Adding to 21211101020112 its reverse (21102010111212), we get a palindrome (42313111131324).

The spelling of 21211101020112 in words is "twenty-one trillion, two hundred eleven billion, one hundred one million, twenty thousand, one hundred twelve".