122421407 has 2 divisors, whose sum is σ = 122421408. Its totient is φ = 122421406.

The previous prime is 122421391. The next prime is 122421421. The reversal of 122421407 is 704124221.

It is a strong prime.

It is an emirp because it is prime and its reverse (704124221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122421407 - 2⁴ = 122421391 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 (122421457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61210703 + 61210704.

It is an arithmetic number, because the mean of its divisors is an integer number (61210704).

Almost surely, 2^122421407 is an apocalyptic number.

122421407 is a deficient number, since it is larger than the sum of its proper divisors (1).

122421407 is an equidigital number, since it uses as much as digits as its factorization.

122421407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 122421407 is about 11064.4207711023. The cubic root of 122421407 is about 496.5379598832.

Adding to 122421407 its reverse (704124221), we get a palindrome (826545628).

The spelling of 122421407 in words is "one hundred twenty-two million, four hundred twenty-one thousand, four hundred seven".