12020312103 has 4 divisors (see below), whose sum is σ = 16027082808. Its totient is φ = 8013541400.

The previous prime is 12020312069. The next prime is 12020312131. The reversal of 12020312103 is 30121302021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12020312103 - 2⁶ = 12020312039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020312153) 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, 2003385348 + ... + 2003385353.

It is an arithmetic number, because the mean of its divisors is an integer number (4006770702).

Almost surely, 2^12020312103 is an apocalyptic number.

12020312103 is a deficient number, since it is larger than the sum of its proper divisors (4006770705).

12020312103 is an equidigital number, since it uses as much as digits as its factorization.

12020312103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006770704.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12020312103 its reverse (30121302021), we get a palindrome (42141614124).

The spelling of 12020312103 in words is "twelve billion, twenty million, three hundred twelve thousand, one hundred three".