121643224 has 16 divisors (see below), whose sum is σ = 228828600. Its totient is φ = 60622272.

The previous prime is 121643213. The next prime is 121643239. The reversal of 121643224 is 422346121.

121643224 = T₂₉₇ + T₂₉₈ + ... + T₉₁₀.

It is a happy number.

It is a super-2 number, since 2×121643224² = 29594147890228352, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22309 + ... + 27220.

Almost surely, 2^121643224 is an apocalyptic number.

It is an amenable number.

121643224 is a deficient number, since it is larger than the sum of its proper divisors (107185376).

121643224 is a wasteful number, since it uses less digits than its factorization.

121643224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49842 (or 49838 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 121643224 is about 11029.1987016283. The cubic root of 121643224 is about 495.4836262338.

Adding to 121643224 its reverse (422346121), we get a palindrome (543989345).

The spelling of 121643224 in words is "one hundred twenty-one million, six hundred forty-three thousand, two hundred twenty-four".