20121220001095 has 64 divisors (see below), whose sum is σ = 27356787279360. Its totient is φ = 14117096448000.

The previous prime is 20121220001093. The next prime is 20121220001149. The reversal of 20121220001095 is 59010002212102.

It is not a de Polignac number, because 20121220001095 - 2¹ = 20121220001093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121220001093) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 23486020 + ... + 24327670.

It is an arithmetic number, because the mean of its divisors is an integer number (427449801240).

Almost surely, 2^{20121220001095} is an apocalyptic number.

20121220001095 is a deficient number, since it is larger than the sum of its proper divisors (7235567278265).

20121220001095 is a wasteful number, since it uses less digits than its factorization.

20121220001095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841936.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 20121220001095 its reverse (59010002212102), we get a palindrome (79131222213197).

The spelling of 20121220001095 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one thousand, ninety-five".