121643273 has 2 divisors, whose sum is σ = 121643274. Its totient is φ = 121643272.

The previous prime is 121643239. The next prime is 121643281. The reversal of 121643273 is 372346121.

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., 120406729 + 1236544 = 10973^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 121643273 - 2⁸ = 121643017 is a prime.

It is not a weakly prime, because it can be changed into another prime (121643213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60821636 + 60821637.

It is an arithmetic number, because the mean of its divisors is an integer number (60821637).

Almost surely, 2^121643273 is an apocalyptic number.

It is an amenable number.

121643273 is a deficient number, since it is larger than the sum of its proper divisors (1).

121643273 is an equidigital number, since it uses as much as digits as its factorization.

121643273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 121643273 is about 11029.2009230043. The cubic root of 121643273 is about 495.4836927636.

Adding to 121643273 its reverse (372346121), we get a palindrome (493989394).

The spelling of 121643273 in words is "one hundred twenty-one million, six hundred forty-three thousand, two hundred seventy-three".