20121220120210 has 64 divisors (see below), whose sum is σ = 39668666803200. Its totient is φ = 7287613358080.

The previous prime is 20121220120193. The next prime is 20121220120237. The reversal of 20121220120210 is 1202102212102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33210066 + ... + 33810514.

It is an arithmetic number, because the mean of its divisors is an integer number (619822918800).

Almost surely, 2^{20121220120210} is an apocalyptic number.

20121220120210 is a deficient number, since it is larger than the sum of its proper divisors (19547446682990).

20121220120210 is a wasteful number, since it uses less digits than its factorization.

20121220120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601683.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20121220120210 its reverse (1202102212102), we get a palindrome (21323322332312).

The spelling of 20121220120210 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred ten".