12121122031 has 2 divisors, whose sum is σ = 12121122032. Its totient is φ = 12121122030.

The previous prime is 12121121993. The next prime is 12121122089. The reversal of 12121122031 is 13022112121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121122031 is a prime.

It is a super-2 number, since 2×12121122031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121121996 and 12121122014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060561015 + 6060561016.

It is an arithmetic number, because the mean of its divisors is an integer number (6060561016).

Almost surely, 2^12121122031 is an apocalyptic number.

12121122031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121122031 is an equidigital number, since it uses as much as digits as its factorization.

12121122031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12121122031 its reverse (13022112121), we get a palindrome (25143234152).

The spelling of 12121122031 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, thirty-one".