1200123221 has 8 divisors (see below), whose sum is σ = 1316541600. Its totient is φ = 1084924240.

The previous prime is 1200123173. The next prime is 1200123241. The reversal of 1200123221 is 1223210021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200123221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200123196 and 1200123205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200123241) 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, 302786 + ... + 306723.

It is an arithmetic number, because the mean of its divisors is an integer number (164567700).

Almost surely, 2^1200123221 is an apocalyptic number.

1200123221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200123221 is a deficient number, since it is larger than the sum of its proper divisors (116418379).

1200123221 is a wasteful number, since it uses less digits than its factorization.

1200123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609699.

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

The square root of 1200123221 is about 34642.7946476609. The cubic root of 1200123221 is about 1062.6949406743.

Adding to 1200123221 its reverse (1223210021), we get a palindrome (2423333242).

It can be divided in two parts, 1200 and 123221, that added together give a palindrome (124421).

The spelling of 1200123221 in words is "one billion, two hundred million, one hundred twenty-three thousand, two hundred twenty-one".