1223214021 has 8 divisors (see below), whose sum is σ = 1812168960. Its totient is φ = 815475996.

The previous prime is 1223214007. The next prime is 1223214059. The reversal of 1223214021 is 1204123221.

It is a happy number.

It is not a de Polignac number, because 1223214021 - 2⁵ = 1223213989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223213985 and 1223214003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223218021) 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, 22652085 + ... + 22652138.

It is an arithmetic number, because the mean of its divisors is an integer number (226521120).

Almost surely, 2^1223214021 is an apocalyptic number.

It is an amenable number.

1223214021 is a deficient number, since it is larger than the sum of its proper divisors (588954939).

1223214021 is an equidigital number, since it uses as much as digits as its factorization.

1223214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45304232 (or 45304226 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1223214021 is about 34974.4767080224. The cubic root of 1223214021 is about 1069.4672344098.

Adding to 1223214021 its reverse (1204123221), we get a palindrome (2427337242).

The spelling of 1223214021 in words is "one billion, two hundred twenty-three million, two hundred fourteen thousand, twenty-one".