1233215221 has 8 divisors (see below), whose sum is σ = 1409754944. Its totient is φ = 1056767040.

The previous prime is 1233215213. The next prime is 1233215231. The reversal of 1233215221 is 1225123321.

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

It is not a de Polignac number, because 1233215221 - 2³ = 1233215213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233215192 and 1233215201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233215231) 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, 8941 + ... + 50461.

It is an arithmetic number, because the mean of its divisors is an integer number (176219368).

Almost surely, 2^1233215221 is an apocalyptic number.

It is an amenable number.

1233215221 is a deficient number, since it is larger than the sum of its proper divisors (176539723).

1233215221 is an equidigital number, since it uses as much as digits as its factorization.

1233215221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45771.

The product of its digits is 720, while the sum is 22.

The square root of 1233215221 is about 35117.1641935963. The cubic root of 1233215221 is about 1072.3740401913.

Adding to 1233215221 its reverse (1225123321), we get a palindrome (2458338542).

The spelling of 1233215221 in words is "one billion, two hundred thirty-three million, two hundred fifteen thousand, two hundred twenty-one".