21021100212012 has 48 divisors (see below), whose sum is σ = 49924975968000. Its totient is φ = 6882661145920.

The previous prime is 21021100211983. The next prime is 21021100212031. The reversal of 21021100212012 is 21021200112012.

It is a junction number, because it is equal to n+sod(n) for n = 21021100211982 and 21021100212000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45630762 + ... + 46089137.

It is an arithmetic number, because the mean of its divisors is an integer number (1040103666000).

Almost surely, 2^{21021100212012} is an apocalyptic number.

It is an amenable number.

21021100212012 is an abundant number, since it is smaller than the sum of its proper divisors (28903875755988).

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

21021100212012 is a wasteful number, since it uses less digits than its factorization.

21021100212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91720246 (or 91720244 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021100212012 its reverse (21021200112012), we get a palindrome (42042300324024).

The spelling of 21021100212012 in words is "twenty-one trillion, twenty-one billion, one hundred million, two hundred twelve thousand, twelve".