21100110312 has 16 divisors (see below), whose sum is σ = 52750275840. Its totient is φ = 7033370096.

The previous prime is 21100110301. The next prime is 21100110313. The reversal of 21100110312 is 21301100112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21100110313) 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, 439585608 + ... + 439585655.

It is an arithmetic number, because the mean of its divisors is an integer number (3296892240).

Almost surely, 2^21100110312 is an apocalyptic number.

It is an amenable number.

21100110312 is an abundant number, since it is smaller than the sum of its proper divisors (31650165528).

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

21100110312 is a wasteful number, since it uses less digits than its factorization.

21100110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879171272 (or 879171268 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21100110312 its reverse (21301100112), we get a palindrome (42401210424).

The spelling of 21100110312 in words is "twenty-one billion, one hundred million, one hundred ten thousand, three hundred twelve".