21200002212 has 24 divisors (see below), whose sum is σ = 49956443712. Its totient is φ = 6996700000.

The previous prime is 21200002199. The next prime is 21200002237. The reversal of 21200002212 is 21220000212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 8744664 + ... + 8747087.

It is an arithmetic number, because the mean of its divisors is an integer number (2081518488).

Almost surely, 2^21200002212 is an apocalyptic number.

It is an amenable number.

21200002212 is an abundant number, since it is smaller than the sum of its proper divisors (28756441500).

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

21200002212 is a wasteful number, since it uses less digits than its factorization.

21200002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17491859 (or 17491857 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21200002212 its reverse (21220000212), we get a palindrome (42420002424).

It can be divided in two parts, 2120000 and 2212, that added together give a palindrome (2122212).

The spelling of 21200002212 in words is "twenty-one billion, two hundred million, two thousand, two hundred twelve".