121228501 has 2 divisors, whose sum is σ = 121228502. Its totient is φ = 121228500.

The previous prime is 121228489. The next prime is 121228519. The reversal of 121228501 is 105822121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 60372900 = 7801^2 + 7770^2 .

It is a cyclic number.

It is not a de Polignac number, because 121228501 - 2⁹ = 121227989 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121228571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60614250 + 60614251.

It is an arithmetic number, because the mean of its divisors is an integer number (60614251).

Almost surely, 2^121228501 is an apocalyptic number.

It is an amenable number.

121228501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121228501 is an equidigital number, since it uses as much as digits as its factorization.

121228501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 121228501 is about 11010.3815101930. The cubic root of 121228501 is about 494.9198945297.

The spelling of 121228501 in words is "one hundred twenty-one million, two hundred twenty-eight thousand, five hundred one".