21102330201212 has 24 divisors (see below), whose sum is σ = 41498896852896. Its totient is φ = 9316078884288.

The previous prime is 21102330201209. The next prime is 21102330201223. The reversal of 21102330201212 is 21210203320112.

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, 8822043203 + ... + 8822045594.

It is an arithmetic number, because the mean of its divisors is an integer number (1729120702204).

Almost surely, 2^{21102330201212} is an apocalyptic number.

It is an amenable number.

21102330201212 is a deficient number, since it is larger than the sum of its proper divisors (20396566651684).

21102330201212 is a wasteful number, since it uses less digits than its factorization.

21102330201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17644088837 (or 17644088835 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21102330201212 its reverse (21210203320112), we get a palindrome (42312533521324).

The spelling of 21102330201212 in words is "twenty-one trillion, one hundred two billion, three hundred thirty million, two hundred one thousand, two hundred twelve".