121422643 has 2 divisors, whose sum is σ = 121422644. Its totient is φ = 121422642.

The previous prime is 121422617. The next prime is 121422647. The reversal of 121422643 is 346224121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (346224121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121422643 - 2¹³ = 121414451 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (121422647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60711321 + 60711322.

It is an arithmetic number, because the mean of its divisors is an integer number (60711322).

Almost surely, 2^121422643 is an apocalyptic number.

121422643 is a deficient number, since it is larger than the sum of its proper divisors (1).

121422643 is an equidigital number, since it uses as much as digits as its factorization.

121422643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 121422643 is about 11019.1942990402. The cubic root of 121422643 is about 495.1839509498.

Adding to 121422643 its reverse (346224121), we get a palindrome (467646764).

The spelling of 121422643 in words is "one hundred twenty-one million, four hundred twenty-two thousand, six hundred forty-three".