12121011173 has 2 divisors, whose sum is σ = 12121011174. Its totient is φ = 12121011172.

The previous prime is 12121011167. The next prime is 12121011223. The reversal of 12121011173 is 37111012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11934907009 + 186104164 = 109247^2 + 13642^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121011173 - 2¹⁶ = 12120945637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121011143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060505586 + 6060505587.

It is an arithmetic number, because the mean of its divisors is an integer number (6060505587).

Almost surely, 2^12121011173 is an apocalyptic number.

It is an amenable number.

12121011173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121011173 is an equidigital number, since it uses as much as digits as its factorization.

12121011173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 12121011173 its reverse (37111012121), we get a palindrome (49232023294).

The spelling of 12121011173 in words is "twelve billion, one hundred twenty-one million, eleven thousand, one hundred seventy-three".