121226401 has 2 divisors, whose sum is σ = 121226402. Its totient is φ = 121226400.

The previous prime is 121226389. The next prime is 121226407. The reversal of 121226401 is 104622121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110670400 + 10556001 = 10520^2 + 3249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121226401 is a prime.

It is not a weakly prime, because it can be changed into another prime (121226407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60613200 + 60613201.

It is an arithmetic number, because the mean of its divisors is an integer number (60613201).

Almost surely, 2^121226401 is an apocalyptic number.

It is an amenable number.

121226401 is a deficient number, since it is larger than the sum of its proper divisors (1).

121226401 is an equidigital number, since it uses as much as digits as its factorization.

121226401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121226401 is about 11010.2861452371. The cubic root of 121226401 is about 494.9170367370.

Adding to 121226401 its reverse (104622121), we get a palindrome (225848522).

The spelling of 121226401 in words is "one hundred twenty-one million, two hundred twenty-six thousand, four hundred one".