121601253 has 16 divisors (see below), whose sum is σ = 169468416. Its totient is φ = 77412720.

The previous prime is 121601213. The next prime is 121601257. The reversal of 121601253 is 352106121.

It is a de Polignac number, because none of the positive numbers 2^k-121601253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121601257) 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 in 15 ways as a sum of consecutive naturals, for example, 55998 + ... + 58128.

It is an arithmetic number, because the mean of its divisors is an integer number (10591776).

Almost surely, 2^121601253 is an apocalyptic number.

It is an amenable number.

121601253 is a deficient number, since it is larger than the sum of its proper divisors (47867163).

121601253 is a wasteful number, since it uses less digits than its factorization.

121601253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 121601253 is about 11027.2958153847. The cubic root of 121601253 is about 495.4266335114.

Adding to 121601253 its reverse (352106121), we get a palindrome (473707374).

The spelling of 121601253 in words is "one hundred twenty-one million, six hundred one thousand, two hundred fifty-three".