12123220101 has 4 divisors (see below), whose sum is σ = 16164293472. Its totient is φ = 8082146732.

The previous prime is 12123220099. The next prime is 12123220103. The reversal of 12123220101 is 10102232121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12123220099) and next prime (12123220103).

It is a cyclic number.

It is not a de Polignac number, because 12123220101 - 2¹ = 12123220099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123220103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020536681 + ... + 2020536686.

It is an arithmetic number, because the mean of its divisors is an integer number (4041073368).

Almost surely, 2^12123220101 is an apocalyptic number.

It is an amenable number.

12123220101 is a deficient number, since it is larger than the sum of its proper divisors (4041073371).

12123220101 is an equidigital number, since it uses as much as digits as its factorization.

12123220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041073370.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12123220101 its reverse (10102232121), we get a palindrome (22225452222).

The spelling of 12123220101 in words is "twelve billion, one hundred twenty-three million, two hundred twenty thousand, one hundred one".