121312229 has 2 divisors, whose sum is σ = 121312230. Its totient is φ = 121312228.

The previous prime is 121312199. The next prime is 121312253. The reversal of 121312229 is 922213121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112890625 + 8421604 = 10625^2 + 2902^2 .

It is an emirp because it is prime and its reverse (922213121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121312229 - 2¹² = 121308133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656114 + 60656115.

It is an arithmetic number, because the mean of its divisors is an integer number (60656115).

Almost surely, 2^121312229 is an apocalyptic number.

It is an amenable number.

121312229 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312229 is an equidigital number, since it uses as much as digits as its factorization.

121312229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 121312229 is about 11014.1830836427. The cubic root of 121312229 is about 495.0338092066.

The spelling of 121312229 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred twenty-nine".