12120020101 has 6 divisors (see below), whose sum is σ = 14098798950. Its totient is φ = 10388588616.

The previous prime is 12120020057. The next prime is 12120020113. The reversal of 12120020101 is 10102002121.

It can be written as a sum of positive squares in only one way, i.e., 10538049025 + 1581971076 = 102655^2 + 39774^2 .

It is not a de Polignac number, because 12120020101 - 2⁷ = 12120019973 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 (12120020161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123673626 + ... + 123673723.

It is an arithmetic number, because the mean of its divisors is an integer number (2349799825).

Almost surely, 2^12120020101 is an apocalyptic number.

It is an amenable number.

12120020101 is a deficient number, since it is larger than the sum of its proper divisors (1978778849).

12120020101 is an equidigital number, since it uses as much as digits as its factorization.

12120020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247347363 (or 247347356 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12120020101 its reverse (10102002121), we get a palindrome (22222022222).

The spelling of 12120020101 in words is "twelve billion, one hundred twenty million, twenty thousand, one hundred one".