121223247 has 8 divisors (see below), whose sum is σ = 161790720. Its totient is φ = 80735640.

The previous prime is 121223239. The next prime is 121223257. The reversal of 121223247 is 742322121.

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

It is not a de Polignac number, because 121223247 - 2³ = 121223239 is a prime.

It is a super-2 number, since 2×121223247² = 29390151226446018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16329 + ... + 22562.

It is an arithmetic number, because the mean of its divisors is an integer number (20223840).

Almost surely, 2^121223247 is an apocalyptic number.

121223247 is a deficient number, since it is larger than the sum of its proper divisors (40567473).

121223247 is a wasteful number, since it uses less digits than its factorization.

121223247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39933.

The product of its digits is 1344, while the sum is 24.

The square root of 121223247 is about 11010.1429146038. The cubic root of 121223247 is about 494.9127445425.

Adding to 121223247 its reverse (742322121), we get a palindrome (863545368).

The spelling of 121223247 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred forty-seven".