21211101110112 has 48 divisors (see below), whose sum is σ = 57183982056432. Its totient is φ = 6879276034560.

The previous prime is 21211101110099. The next prime is 21211101110117. The reversal of 21211101110112 is 21101110111212.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21211101110091 and 21211101110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211101110117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2985793339 + ... + 2985800442.

It is an arithmetic number, because the mean of its divisors is an integer number (1191332959509).

Almost surely, 2^{21211101110112} is an apocalyptic number.

It is an amenable number.

21211101110112 is an abundant number, since it is smaller than the sum of its proper divisors (35972880946320).

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

21211101110112 is a wasteful number, since it uses less digits than its factorization.

21211101110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5971593831 (or 5971593823 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21211101110112 its reverse (21101110111212), we get a palindrome (42312211221324).

The spelling of 21211101110112 in words is "twenty-one trillion, two hundred eleven billion, one hundred one million, one hundred ten thousand, one hundred twelve".