12121234031 has 4 divisors (see below), whose sum is σ = 12121761864. Its totient is φ = 12120706200.

The previous prime is 12121234007. The next prime is 12121234033. The reversal of 12121234031 is 13043212121.

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 12121234031 - 2⁶ = 12121233967 is a prime.

It is a super-2 number, since 2×12121234031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121233994 and 12121234012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121234033) 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, 227825 + ... + 275946.

It is an arithmetic number, because the mean of its divisors is an integer number (3030440466).

Almost surely, 2^12121234031 is an apocalyptic number.

12121234031 is a deficient number, since it is larger than the sum of its proper divisors (527833).

12121234031 is an equidigital number, since it uses as much as digits as its factorization.

12121234031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527832.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12121234031 its reverse (13043212121), we get a palindrome (25164446152).

The spelling of 12121234031 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-four thousand, thirty-one".