20121220212110 has 32 divisors (see below), whose sum is σ = 37309208191200. Its totient is φ = 7808553422208.

The previous prime is 20121220212091. The next prime is 20121220212173. The reversal of 20121220212110 is 1121202212102.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 156961217 + ... + 157089356.

It is an arithmetic number, because the mean of its divisors is an integer number (1165912755975).

Almost surely, 2^{20121220212110} is an apocalyptic number.

20121220212110 is a deficient number, since it is larger than the sum of its proper divisors (17187987979090).

20121220212110 is a wasteful number, since it uses less digits than its factorization.

20121220212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314050772.

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

Adding to 20121220212110 its reverse (1121202212102), we get a palindrome (21242422424212).

The spelling of 20121220212110 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred ten".