21200022212 has 12 divisors (see below), whose sum is σ = 37154362896. Its totient is φ = 10584489960.

The previous prime is 21200022211. The next prime is 21200022251. The reversal of 21200022212 is 21222000212.

It is not an unprimeable number, because it can be changed into a prime (21200022211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3877214 + ... + 3882677.

It is an arithmetic number, because the mean of its divisors is an integer number (3096196908).

Almost surely, 2^21200022212 is an apocalyptic number.

It is an amenable number.

21200022212 is a deficient number, since it is larger than the sum of its proper divisors (15954340684).

21200022212 is a wasteful number, since it uses less digits than its factorization.

21200022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760578 (or 7760576 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21200022212 its reverse (21222000212), we get a palindrome (42422022424).

The spelling of 21200022212 in words is "twenty-one billion, two hundred million, twenty-two thousand, two hundred twelve".