21200002212212 has 24 divisors (see below), whose sum is σ = 37240782384960. Its totient is φ = 10559828062080.

The previous prime is 21200002212209. The next prime is 21200002212227. The reversal of 21200002212212 is 21221220000212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4455512 + ... + 7889967.

It is an arithmetic number, because the mean of its divisors is an integer number (1551699266040).

Almost surely, 2^{21200002212212} is an apocalyptic number.

It is an amenable number.

21200002212212 is a deficient number, since it is larger than the sum of its proper divisors (16040780172748).

21200002212212 is a wasteful number, since it uses less digits than its factorization.

21200002212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12347111 (or 12347109 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21200002212212 its reverse (21221220000212), we get a palindrome (42421222212424).

The spelling of 21200002212212 in words is "twenty-one trillion, two hundred billion, two million, two hundred twelve thousand, two hundred twelve".