1224696121 has 4 divisors (see below), whose sum is σ = 1336032144. Its totient is φ = 1113360100.

The previous prime is 1224696097. The next prime is 1224696127. The reversal of 1224696121 is 1216964221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1216964221 = 11 ⋅110633111.

It is a cyclic number.

It is not a de Polignac number, because 1224696121 - 2⁹ = 1224695609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224696127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55667995 + ... + 55668016.

It is an arithmetic number, because the mean of its divisors is an integer number (334008036).

Almost surely, 2^1224696121 is an apocalyptic number.

1224696121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224696121 is a deficient number, since it is larger than the sum of its proper divisors (111336023).

1224696121 is a wasteful number, since it uses less digits than its factorization.

1224696121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111336022.

The product of its digits is 10368, while the sum is 34.

The square root of 1224696121 is about 34995.6586021752. The cubic root of 1224696121 is about 1069.8989979487.

The spelling of 1224696121 in words is "one billion, two hundred twenty-four million, six hundred ninety-six thousand, one hundred twenty-one".