20121221110210 has 16 divisors (see below), whose sum is σ = 39510761452992. Its totient is φ = 7316807676400.

The previous prime is 20121221110183. The next prime is 20121221110219. The reversal of 20121221110210 is 1201112212102.

It is not an unprimeable number, because it can be changed into a prime (20121221110219) 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, 91460095846 + ... + 91460096065.

It is an arithmetic number, because the mean of its divisors is an integer number (2469422590812).

Almost surely, 2^{20121221110210} is an apocalyptic number.

20121221110210 is a deficient number, since it is larger than the sum of its proper divisors (19389540342782).

20121221110210 is a wasteful number, since it uses less digits than its factorization.

20121221110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182920191929.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121221110210 its reverse (1201112212102), we get a palindrome (21322333322312).

The spelling of 20121221110210 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, two hundred ten".