1223300021 has 8 divisors (see below), whose sum is σ = 1263168000. Its totient is φ = 1183457520.

The previous prime is 1223299993. The next prime is 1223300027. The reversal of 1223300021 is 1200033221.

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-1223300021 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 = 1223299969 and 1223300005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223300027) 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, 163715 + ... + 171023.

It is an arithmetic number, because the mean of its divisors is an integer number (157896000).

Almost surely, 2^1223300021 is an apocalyptic number.

It is an amenable number.

1223300021 is a deficient number, since it is larger than the sum of its proper divisors (39867979).

1223300021 is an equidigital number, since it uses as much as digits as its factorization.

1223300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1223300021 is about 34975.7061544152. The cubic root of 1223300021 is about 1069.4922973520.

Adding to 1223300021 its reverse (1200033221), we get a palindrome (2423333242).

The spelling of 1223300021 in words is "one billion, two hundred twenty-three million, three hundred thousand, twenty-one".