121234621 has 2 divisors, whose sum is σ = 121234622. Its totient is φ = 121234620.

The previous prime is 121234591. The next prime is 121234637. The reversal of 121234621 is 126432121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 7918596 = 10645^2 + 2814^2 .

It is an emirp because it is prime and its reverse (126432121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121234621 - 2⁷ = 121234493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121234592 and 121234601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121234651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60617310 + 60617311.

It is an arithmetic number, because the mean of its divisors is an integer number (60617311).

Almost surely, 2^121234621 is an apocalyptic number.

It is an amenable number.

121234621 is a deficient number, since it is larger than the sum of its proper divisors (1).

121234621 is an equidigital number, since it uses as much as digits as its factorization.

121234621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 121234621 is about 11010.6594262106. The cubic root of 121234621 is about 494.9282227660.

Adding to 121234621 its reverse (126432121), we get a palindrome (247666742).

The spelling of 121234621 in words is "one hundred twenty-one million, two hundred thirty-four thousand, six hundred twenty-one".