121226153 has 2 divisors, whose sum is σ = 121226154. Its totient is φ = 121226152.

The previous prime is 121226101. The next prime is 121226233. The reversal of 121226153 is 351622121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115713049 + 5513104 = 10757^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 121226153 - 2¹⁸ = 120964009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121220153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60613076 + 60613077.

It is an arithmetic number, because the mean of its divisors is an integer number (60613077).

Almost surely, 2^121226153 is an apocalyptic number.

It is an amenable number.

121226153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121226153 is an equidigital number, since it uses as much as digits as its factorization.

121226153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 121226153 is about 11010.2748830354. The cubic root of 121226153 is about 494.9166992431.

Adding to 121226153 its reverse (351622121), we get a palindrome (472848274).

The spelling of 121226153 in words is "one hundred twenty-one million, two hundred twenty-six thousand, one hundred fifty-three".