1223200121 has 16 divisors (see below), whose sum is σ = 1460614848. Its totient is φ = 1009627200.

The previous prime is 1223200103. The next prime is 1223200129. The reversal of 1223200121 is 1210023221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1223200121 - 2¹⁰ = 1223199097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223200096 and 1223200105.

It is not an unprimeable number, because it can be changed into a prime (1223200129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61391 + ... + 78836.

It is an arithmetic number, because the mean of its divisors is an integer number (91288428).

Almost surely, 2^1223200121 is an apocalyptic number.

1223200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223200121 is a deficient number, since it is larger than the sum of its proper divisors (237414727).

1223200121 is a wasteful number, since it uses less digits than its factorization.

1223200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140312.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1223200121 is about 34974.2779911180. The cubic root of 1223200121 is about 1069.4631834287.

Adding to 1223200121 its reverse (1210023221), we get a palindrome (2433223342).

Subtracting from 1223200121 its reverse (1210023221), we obtain a square (13176900 = 3630²).

The spelling of 1223200121 in words is "one billion, two hundred twenty-three million, two hundred thousand, one hundred twenty-one".