21212200210 has 16 divisors (see below), whose sum is σ = 40191537600. Its totient is φ = 8038307376.

The previous prime is 21212200187. The next prime is 21212200253. The reversal of 21212200210 is 1200221212.

It is a happy 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, 55821390 + ... + 55821769.

It is an arithmetic number, because the mean of its divisors is an integer number (2511971100).

Almost surely, 2^21212200210 is an apocalyptic number.

21212200210 is a deficient number, since it is larger than the sum of its proper divisors (18979337390).

21212200210 is a wasteful number, since it uses less digits than its factorization.

21212200210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111643185.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21212200210 its reverse (1200221212), we get a palindrome (22412421422).

The spelling of 21212200210 in words is "twenty-one billion, two hundred twelve million, two hundred thousand, two hundred ten".