122220401 has 2 divisors, whose sum is σ = 122220402. Its totient is φ = 122220400.

The previous prime is 122220377. The next prime is 122220409. The reversal of 122220401 is 104022221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118701025 + 3519376 = 10895^2 + 1876^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220401 - 2¹⁸ = 121958257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122220409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110200 + 61110201.

It is an arithmetic number, because the mean of its divisors is an integer number (61110201).

Almost surely, 2^122220401 is an apocalyptic number.

It is an amenable number.

122220401 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220401 is an equidigital number, since it uses as much as digits as its factorization.

122220401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 122220401 is about 11055.3335996703. Note that the first 3 decimals coincide. The cubic root of 122220401 is about 496.2660526883.

Adding to 122220401 its reverse (104022221), we get a palindrome (226242622).

The spelling of 122220401 in words is "one hundred twenty-two million, two hundred twenty thousand, four hundred one".