121323207 has 4 divisors (see below), whose sum is σ = 161764280. Its totient is φ = 80882136.

The previous prime is 121323199. The next prime is 121323221. The reversal of 121323207 is 702323121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702323121 = 3 ⋅234107707.

It is not a de Polignac number, because 121323207 - 2³ = 121323199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323247) 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, 20220532 + ... + 20220537.

It is an arithmetic number, because the mean of its divisors is an integer number (40441070).

Almost surely, 2^121323207 is an apocalyptic number.

121323207 is a deficient number, since it is larger than the sum of its proper divisors (40441073).

121323207 is an equidigital number, since it uses as much as digits as its factorization.

121323207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40441072.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 121323207 is about 11014.6814298009. The cubic root of 121323207 is about 495.0487412468.

Adding to 121323207 its reverse (702323121), we get a palindrome (823646328).

The spelling of 121323207 in words is "one hundred twenty-one million, three hundred twenty-three thousand, two hundred seven".