12111021202031 has 2 divisors, whose sum is σ = 12111021202032. Its totient is φ = 12111021202030.

The previous prime is 12111021202019. The next prime is 12111021202067. The reversal of 12111021202031 is 13020212011121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111021202031 - 2¹⁴ = 12111021185647 is a prime.

It is a super-2 number, since 2×12111021202031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111021202831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055510601015 + 6055510601016.

It is an arithmetic number, because the mean of its divisors is an integer number (6055510601016).

Almost surely, 2^{12111021202031} is an apocalyptic number.

12111021202031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111021202031 is an equidigital number, since it uses as much as digits as its factorization.

12111021202031 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 17.

Adding to 12111021202031 its reverse (13020212011121), we get a palindrome (25131233213152).

The spelling of 12111021202031 in words is "twelve trillion, one hundred eleven billion, twenty-one million, two hundred two thousand, thirty-one".