12121020169 has 2 divisors, whose sum is σ = 12121020170. Its totient is φ = 12121020168.

The previous prime is 12121020133. The next prime is 12121020251. The reversal of 12121020169 is 96102012121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7444238400 + 4676781769 = 86280^2 + 68387^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121020169 - 2²⁵ = 12087465737 is a prime.

It is a super-2 number, since 2×12121020169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121030169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060510084 + 6060510085.

It is an arithmetic number, because the mean of its divisors is an integer number (6060510085).

Almost surely, 2^12121020169 is an apocalyptic number.

It is an amenable number.

12121020169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121020169 is an equidigital number, since it uses as much as digits as its factorization.

12121020169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 12121020169 in words is "twelve billion, one hundred twenty-one million, twenty thousand, one hundred sixty-nine".