12105121031 has 8 divisors (see below), whose sum is σ = 12819615984. Its totient is φ = 11390896000.

The previous prime is 12105121009. The next prime is 12105121033. The reversal of 12105121031 is 13012150121.

12105121031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12105121031 - 2¹⁴ = 12105104647 is a prime.

It is a super-2 number, since 2×12105121031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105121033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28796 + ... + 158238.

It is an arithmetic number, because the mean of its divisors is an integer number (1602451998).

Almost surely, 2^12105121031 is an apocalyptic number.

12105121031 is a deficient number, since it is larger than the sum of its proper divisors (714494953).

12105121031 is a wasteful number, since it uses less digits than its factorization.

12105121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134961.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 12105121031 its reverse (13012150121), we get a palindrome (25117271152).

The spelling of 12105121031 in words is "twelve billion, one hundred five million, one hundred twenty-one thousand, thirty-one".