121269 has 4 divisors (see below), whose sum is σ = 161696. Its totient is φ = 80844.

The previous prime is 121267. The next prime is 121271. The reversal of 121269 is 962121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (121267) and next prime (121271).

It is not a de Polignac number, because 121269 - 2¹ = 121267 is a prime.

It is a super-2 number, since 2×121269² = 29412340722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20209 + ... + 20214.

It is an arithmetic number, because the mean of its divisors is an integer number (40424).

2¹²¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

121269 is a deficient number, since it is larger than the sum of its proper divisors (40427).

121269 is an equidigital number, since it uses as much as digits as its factorization.

121269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40426.

The product of its digits is 216, while the sum is 21.

The square root of 121269 is about 348.2369882709. The cubic root of 121269 is about 49.4975001288.

The spelling of 121269 in words is "one hundred twenty-one thousand, two hundred sixty-nine".