121342231 has 4 divisors (see below), whose sum is σ = 121365864. Its totient is φ = 121318600.

The previous prime is 121342229. The next prime is 121342261. The reversal of 121342231 is 132243121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132243121 = 2381 ⋅55541.

It is a cyclic number.

It is not a de Polignac number, because 121342231 - 2¹ = 121342229 is a prime.

It is a super-2 number, since 2×121342231² = 29447874048114722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121342199 and 121342208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (30341466).

Almost surely, 2^121342231 is an apocalyptic number.

121342231 is a deficient number, since it is larger than the sum of its proper divisors (23633).

121342231 is an equidigital number, since it uses as much as digits as its factorization.

121342231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23632.

The product of its digits is 288, while the sum is 19.

The square root of 121342231 is about 11015.5449706313. The cubic root of 121342231 is about 495.0746151508.

Adding to 121342231 its reverse (132243121), we get a palindrome (253585352).

It can be divided in two parts, 12134 and 2231, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 121342231 in words is "one hundred twenty-one million, three hundred forty-two thousand, two hundred thirty-one".