21021000200112 has 160 divisors (see below), whose sum is σ = 63519764474880. Its totient is φ = 5919404175360.

The previous prime is 21021000200089. The next prime is 21021000200117. The reversal of 21021000200112 is 21100200012012.

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 (21021000200117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14113123 + ... + 15531330.

It is an arithmetic number, because the mean of its divisors is an integer number (396998527968).

Almost surely, 2^{21021000200112} is an apocalyptic number.

21021000200112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021000200112 is an abundant number, since it is smaller than the sum of its proper divisors (42498764274768).

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

21021000200112 is a wasteful number, since it uses less digits than its factorization.

21021000200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29644571 (or 29644565 counting only the distinct ones).

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

Adding to 21021000200112 its reverse (21100200012012), we get a palindrome (42121200212124).

The spelling of 21021000200112 in words is "twenty-one trillion, twenty-one billion, two hundred thousand, one hundred twelve".