21000012200112 has 80 divisors (see below), whose sum is σ = 61222606145280. Its totient is φ = 6144204192000.

The previous prime is 21000012200053. The next prime is 21000012200113. The reversal of 21000012200112 is 21100221000012.

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 (21000012200113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685721764 + ... + 685752387.

It is an arithmetic number, because the mean of its divisors is an integer number (765282576816).

Almost surely, 2^{21000012200112} is an apocalyptic number.

21000012200112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000012200112 is an abundant number, since it is smaller than the sum of its proper divisors (40222593945168).

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

21000012200112 is a wasteful number, since it uses less digits than its factorization.

21000012200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371474202 (or 1371474196 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000012200112 its reverse (21100221000012), we get a palindrome (42100233200124).

The spelling of 21000012200112 in words is "twenty-one trillion, twelve million, two hundred thousand, one hundred twelve".