20121271106 has 16 divisors (see below), whose sum is σ = 31304552760. Its totient is φ = 9691804800.

The previous prime is 20121271063. The next prime is 20121271109. The reversal of 20121271106 is 60117212102.

It can be written as a sum of positive squares in 4 ways, for example, as 20085975625 + 35295481 = 141725^2 + 5941^2 .

It is not an unprimeable number, because it can be changed into a prime (20121271109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338611 + ... + 1353558.

Almost surely, 2^20121271106 is an apocalyptic number.

20121271106 is a deficient number, since it is larger than the sum of its proper divisors (11183281654).

20121271106 is a wasteful number, since it uses less digits than its factorization.

20121271106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692309.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 20121271106 its reverse (60117212102), we get a palindrome (80238483208).

The spelling of 20121271106 in words is "twenty billion, one hundred twenty-one million, two hundred seventy-one thousand, one hundred six".