21012000110112 has 144 divisors (see below), whose sum is σ = 60630375627360. Its totient is φ = 6366872709120.

The previous prime is 21012000110089. The next prime is 21012000110119. The reversal of 21012000110112 is 21101100021012.

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 (21012000110119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222271368 + ... + 222365880.

It is an arithmetic number, because the mean of its divisors is an integer number (421044275190).

Almost surely, 2^{21012000110112} is an apocalyptic number.

21012000110112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21012000110112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30315187813680).

21012000110112 is an abundant number, since it is smaller than the sum of its proper divisors (39618375517248).

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

21012000110112 is a wasteful number, since it uses less digits than its factorization.

21012000110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113687 (or 113668 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21012000110112 its reverse (21101100021012), we get a palindrome (42113100131124).

It can be divided in two parts, 21012000 and 110112, that added together give a palindrome (21122112).

The spelling of 21012000110112 in words is "twenty-one trillion, twelve billion, one hundred ten thousand, one hundred twelve".