1223013021 has 8 divisors (see below), whose sum is σ = 1630850784. Its totient is φ = 815258640.

The previous prime is 1223012981. The next prime is 1223013037. The reversal of 1223013021 is 1203103221.

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

It is not a de Polignac number, because 1223013021 - 2²³ = 1214624413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223013041) 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, 33991 + ... + 60011.

It is an arithmetic number, because the mean of its divisors is an integer number (203856348).

Almost surely, 2^1223013021 is an apocalyptic number.

It is an amenable number.

1223013021 is a deficient number, since it is larger than the sum of its proper divisors (407837763).

1223013021 is a wasteful number, since it uses less digits than its factorization.

1223013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41691.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1223013021 is about 34971.6030659162. The cubic root of 1223013021 is about 1069.4086524866.

Adding to 1223013021 its reverse (1203103221), we get a palindrome (2426116242).

The spelling of 1223013021 in words is "one billion, two hundred twenty-three million, thirteen thousand, twenty-one".