121353261 has 16 divisors (see below), whose sum is σ = 163897344. Its totient is φ = 79861104.

The previous prime is 121353227. The next prime is 121353263. The reversal of 121353261 is 162353121.

It is not a de Polignac number, because 121353261 - 2¹¹ = 121351213 is a prime.

It is a super-2 number, since 2×121353261² = 29453227910668242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121353263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187240 + ... + 187886.

It is an arithmetic number, because the mean of its divisors is an integer number (10243584).

Almost surely, 2^121353261 is an apocalyptic number.

It is an amenable number.

121353261 is a deficient number, since it is larger than the sum of its proper divisors (42544083).

121353261 is a wasteful number, since it uses less digits than its factorization.

121353261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its digits is 1080, while the sum is 24.

The square root of 121353261 is about 11016.0456153740. The cubic root of 121353261 is about 495.0896154452.

The spelling of 121353261 in words is "one hundred twenty-one million, three hundred fifty-three thousand, two hundred sixty-one".