12120211011031 has 2 divisors, whose sum is σ = 12120211011032. Its totient is φ = 12120211011030.

The previous prime is 12120211011017. The next prime is 12120211011061. The reversal of 12120211011031 is 13011011202121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120211011031 is a prime.

It is a super-2 number, since 2×12120211011031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120211010996 and 12120211011014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120211011001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060105505515 + 6060105505516.

It is an arithmetic number, because the mean of its divisors is an integer number (6060105505516).

Almost surely, 2^{12120211011031} is an apocalyptic number.

12120211011031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120211011031 is an equidigital number, since it uses as much as digits as its factorization.

12120211011031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12120211011031 its reverse (13011011202121), we get a palindrome (25131222213152).

The spelling of 12120211011031 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, eleven thousand, thirty-one".