121220153 has 2 divisors, whose sum is σ = 121220154. Its totient is φ = 121220152.

The previous prime is 121220147. The next prime is 121220159. The reversal of 121220153 is 351022121.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (121220147) and next prime (121220159).

It can be written as a sum of positive squares in only one way, i.e., 105124009 + 16096144 = 10253^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220153 - 2¹² = 121216057 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610076 + 60610077.

It is an arithmetic number, because the mean of its divisors is an integer number (60610077).

Almost surely, 2^121220153 is an apocalyptic number.

It is an amenable number.

121220153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220153 is an equidigital number, since it uses as much as digits as its factorization.

121220153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121220153 is about 11010.0024069026. The cubic root of 121220153 is about 494.9085339281.

Adding to 121220153 its reverse (351022121), we get a palindrome (472242274).

The spelling of 121220153 in words is "one hundred twenty-one million, two hundred twenty thousand, one hundred fifty-three".