21000221002112 has 48 divisors (see below), whose sum is σ = 45985440070500. Its totient is φ = 9545554993920.

The previous prime is 21000221002093. The next prime is 21000221002121. The reversal of 21000221002112 is 21120012200012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677935862 + ... + 677966837.

Almost surely, 2^{21000221002112} is an apocalyptic number.

21000221002112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000221002112 is an abundant number, since it is smaller than the sum of its proper divisors (24985219068388).

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

21000221002112 is a wasteful number, since it uses less digits than its factorization.

21000221002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355902735 (or 1355902712 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21000221002112 its reverse (21120012200012), we get a palindrome (42120233202124).

The spelling of 21000221002112 in words is "twenty-one trillion, two hundred twenty-one million, two thousand, one hundred twelve".