121215244273 has 2 divisors, whose sum is σ = 121215244274. Its totient is φ = 121215244272.

The previous prime is 121215244201. The next prime is 121215244289. The reversal of 121215244273 is 372442512121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85642266609 + 35572977664 = 292647^2 + 188608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121215244273 is a prime.

It is not a weakly prime, because it can be changed into another prime (121215244973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60607622136 + 60607622137.

It is an arithmetic number, because the mean of its divisors is an integer number (60607622137).

Almost surely, 2^121215244273 is an apocalyptic number.

It is an amenable number.

121215244273 is a deficient number, since it is larger than the sum of its proper divisors (1).

121215244273 is an equidigital number, since it uses as much as digits as its factorization.

121215244273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

Adding to 121215244273 its reverse (372442512121), we get a palindrome (493657756394).

The spelling of 121215244273 in words is "one hundred twenty-one billion, two hundred fifteen million, two hundred forty-four thousand, two hundred seventy-three".