121236223 has 2 divisors, whose sum is σ = 121236224. Its totient is φ = 121236222.

The previous prime is 121236187. The next prime is 121236229. The reversal of 121236223 is 322632121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121236223 - 2²⁵ = 87681791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121236194 and 121236203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121236229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60618111 + 60618112.

It is an arithmetic number, because the mean of its divisors is an integer number (60618112).

Almost surely, 2^121236223 is an apocalyptic number.

121236223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121236223 is an equidigital number, since it uses as much as digits as its factorization.

121236223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 121236223 is about 11010.7321736568. The cubic root of 121236223 is about 494.9304027580.

Adding to 121236223 its reverse (322632121), we get a palindrome (443868344).

The spelling of 121236223 in words is "one hundred twenty-one million, two hundred thirty-six thousand, two hundred twenty-three".