121131223 has 2 divisors, whose sum is σ = 121131224. Its totient is φ = 121131222.

The previous prime is 121131221. The next prime is 121131281. The reversal of 121131223 is 322131121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121131223 - 2¹ = 121131221 is a prime.

Together with 121131221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121131197 and 121131206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121131221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565611 + 60565612.

It is an arithmetic number, because the mean of its divisors is an integer number (60565612).

Almost surely, 2^121131223 is an apocalyptic number.

121131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131223 is an equidigital number, since it uses as much as digits as its factorization.

121131223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 121131223 is about 11005.9630655386. The cubic root of 121131223 is about 494.7874787459.

Adding to 121131223 its reverse (322131121), we get a palindrome (443262344).

The spelling of 121131223 in words is "one hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-three".