121522129 has 2 divisors, whose sum is σ = 121522130. Its totient is φ = 121522128.

The previous prime is 121522061. The next prime is 121522153. The reversal of 121522129 is 921225121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64368529 + 57153600 = 8023^2 + 7560^2 .

It is a cyclic number.

It is not a de Polignac number, because 121522129 - 2¹⁹ = 120997841 is a prime.

It is not a weakly prime, because it can be changed into another prime (121522169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60761064 + 60761065.

It is an arithmetic number, because the mean of its divisors is an integer number (60761065).

Almost surely, 2^121522129 is an apocalyptic number.

It is an amenable number.

121522129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121522129 is an equidigital number, since it uses as much as digits as its factorization.

121522129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 121522129 is about 11023.7075886473. The cubic root of 121522129 is about 495.3191547879.

The spelling of 121522129 in words is "one hundred twenty-one million, five hundred twenty-two thousand, one hundred twenty-nine".