20121021222110 has 16 divisors (see below), whose sum is σ = 36218374938432. Its totient is φ = 8048289213600.

The previous prime is 20121021222089. The next prime is 20121021222119. The reversal of 20121021222110 is 1122212012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121021222119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14199281 + ... + 15551900.

It is an arithmetic number, because the mean of its divisors is an integer number (2263648433652).

Almost surely, 2^{20121021222110} is an apocalyptic number.

20121021222110 is a deficient number, since it is larger than the sum of its proper divisors (16097353716322).

20121021222110 is a wasteful number, since it uses less digits than its factorization.

20121021222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29818819.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20121021222110 its reverse (1122212012102), we get a palindrome (21243233234212).

The spelling of 20121021222110 in words is "twenty trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, one hundred ten".