21101112220312 has 16 divisors (see below), whose sum is σ = 39565429693200. Its totient is φ = 10550330968800.

The previous prime is 21101112220303. The next prime is 21101112220313. The reversal of 21101112220312 is 21302221110112.

It is a self number, because there is not a number n which added to its sum of digits gives 21101112220312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101112220313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27744012 + ... + 28494427.

It is an arithmetic number, because the mean of its divisors is an integer number (2472839355825).

Almost surely, 2^{21101112220312} is an apocalyptic number.

It is an amenable number.

21101112220312 is a deficient number, since it is larger than the sum of its proper divisors (18464317472888).

21101112220312 is a wasteful number, since it uses less digits than its factorization.

21101112220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56285346 (or 56285342 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21101112220312 its reverse (21302221110112), we get a palindrome (42403333330424).

The spelling of 21101112220312 in words is "twenty-one trillion, one hundred one billion, one hundred twelve million, two hundred twenty thousand, three hundred twelve".