21210010212112 has 40 divisors (see below), whose sum is σ = 43518556064952. Its totient is φ = 9979611340800.

The previous prime is 21210010212103. The next prime is 21210010212151. The reversal of 21210010212112 is 21121201001212.

It can be written as a sum of positive squares in 4 ways, for example, as 5860195174656 + 15349815037456 = 2420784^2 + 3917884^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4399189 + ... + 7859572.

Almost surely, 2^{21210010212112} is an apocalyptic number.

It is an amenable number.

21210010212112 is an abundant number, since it is smaller than the sum of its proper divisors (22308545852840).

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

21210010212112 is a wasteful number, since it uses less digits than its factorization.

21210010212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265147 (or 12265141 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21210010212112 its reverse (21121201001212), we get a palindrome (42331211213324).

The spelling of 21210010212112 in words is "twenty-one trillion, two hundred ten billion, ten million, two hundred twelve thousand, one hundred twelve".