12031320101 has 4 divisors (see below), whose sum is σ = 12032222412. Its totient is φ = 12030417792.

The previous prime is 12031320073. The next prime is 12031320107. The reversal of 12031320101 is 10102313021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10319512225 + 1711807876 = 101585^2 + 41374^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031320101 - 2¹⁴ = 12031303717 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 (12031320107) 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, 430850 + ... + 457923.

It is an arithmetic number, because the mean of its divisors is an integer number (3008055603).

Almost surely, 2^12031320101 is an apocalyptic number.

It is an amenable number.

12031320101 is a deficient number, since it is larger than the sum of its proper divisors (902311).

12031320101 is an equidigital number, since it uses as much as digits as its factorization.

12031320101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902310.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12031320101 its reverse (10102313021), we get a palindrome (22133633122).

The spelling of 12031320101 in words is "twelve billion, thirty-one million, three hundred twenty thousand, one hundred one".