121231 has 8 divisors (see below), whose sum is σ = 134784. Its totient is φ = 108120.

The previous prime is 121229. The next prime is 121259. The reversal of 121231 is 132121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121231 - 2¹ = 121229 is a prime.

It is a super-2 number, since 2×121231² = 29393910722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121271) 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 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (16848).

2¹²¹²³¹ is an apocalyptic number.

121231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121231 is a deficient number, since it is larger than the sum of its proper divisors (13553).

121231 is a wasteful number, since it uses less digits than its factorization.

121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 12, while the sum is 10.

The square root of 121231 is about 348.1824234507. The cubic root of 121231 is about 49.4923295260.

Adding to 121231 its reverse (132121), we get a palindrome (253352).

The spelling of 121231 in words is "one hundred twenty-one thousand, two hundred thirty-one".