121220479 has 2 divisors, whose sum is σ = 121220480. Its totient is φ = 121220478.

The previous prime is 121220461. The next prime is 121220507. The reversal of 121220479 is 974022121.

It is an a-pointer prime, because the next prime (121220507) can be obtained adding 121220479 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (974022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121220479 - 2¹¹ = 121218431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610239 + 60610240.

It is an arithmetic number, because the mean of its divisors is an integer number (60610240).

Almost surely, 2^121220479 is an apocalyptic number.

121220479 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220479 is an equidigital number, since it uses as much as digits as its factorization.

121220479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 121220479 is about 11010.0172116123. The cubic root of 121220479 is about 494.9089775838.

The spelling of 121220479 in words is "one hundred twenty-one million, two hundred twenty thousand, four hundred seventy-nine".