21000202122112 has 32 divisors (see below), whose sum is σ = 42070062781800. Its totient is φ = 10441441267200.

The previous prime is 21000202122079. The next prime is 21000202122121. The reversal of 21000202122112 is 21122120200012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458256639 + ... + 458302462.

Almost surely, 2^{21000202122112} is an apocalyptic number.

It is an amenable number.

21000202122112 is an abundant number, since it is smaller than the sum of its proper divisors (21069860659688).

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

21000202122112 is an equidigital number, since it uses as much as digits as its factorization.

21000202122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916559294 (or 916559282 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21000202122112 its reverse (21122120200012), we get a palindrome (42122322322124).

The spelling of 21000202122112 in words is "twenty-one trillion, two hundred two million, one hundred twenty-two thousand, one hundred twelve".