1212300221 has 8 divisors (see below), whose sum is σ = 1341137088. Its totient is φ = 1086568000.

The previous prime is 1212300197. The next prime is 1212300251. The reversal of 1212300221 is 1220032121.

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 not a de Polignac number, because 1212300221 - 2⁶ = 1212300157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212300196 and 1212300205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212300251) 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, 775340 + ... + 776901.

It is an arithmetic number, because the mean of its divisors is an integer number (167642136).

Almost surely, 2^1212300221 is an apocalyptic number.

1212300221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212300221 is a deficient number, since it is larger than the sum of its proper divisors (128836867).

1212300221 is a wasteful number, since it uses less digits than its factorization.

1212300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552323.

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

The square root of 1212300221 is about 34818.1019155266. The cubic root of 1212300221 is about 1066.2770491854.

Adding to 1212300221 its reverse (1220032121), we get a palindrome (2432332342).

The spelling of 1212300221 in words is "one billion, two hundred twelve million, three hundred thousand, two hundred twenty-one".