20121001103 has 16 divisors (see below), whose sum is σ = 23413992960. Its totient is φ = 16933370976.

The previous prime is 20121001091. The next prime is 20121001111. The reversal of 20121001103 is 30110012102.

It is a cyclic number.

It is not a de Polignac number, because 20121001103 - 2²⁸ = 19852565647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121001403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310301 + ... + 369497.

It is an arithmetic number, because the mean of its divisors is an integer number (1463374560).

Almost surely, 2^20121001103 is an apocalyptic number.

20121001103 is a deficient number, since it is larger than the sum of its proper divisors (3292991857).

20121001103 is an equidigital number, since it uses as much as digits as its factorization.

20121001103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60086.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20121001103 its reverse (30110012102), we get a palindrome (50231013205).

The spelling of 20121001103 in words is "twenty billion, one hundred twenty-one million, one thousand, one hundred three".