1243003022221 has 4 divisors (see below), whose sum is σ = 1255071012832. Its totient is φ = 1230935031612.

The previous prime is 1243003022213. The next prime is 1243003022227. The reversal of 1243003022221 is 1222203003421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243003022221 - 2³ = 1243003022213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243003022192 and 1243003022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243003022227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6033995151 + ... + 6033995356.

It is an arithmetic number, because the mean of its divisors is an integer number (313767753208).

Almost surely, 2^{1243003022221} is an apocalyptic number.

It is an amenable number.

1243003022221 is a deficient number, since it is larger than the sum of its proper divisors (12067990611).

1243003022221 is a wasteful number, since it uses less digits than its factorization.

1243003022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12067990610.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1243003022221 its reverse (1222203003421), we get a palindrome (2465206025642).

The spelling of 1243003022221 in words is "one trillion, two hundred forty-three billion, three million, twenty-two thousand, two hundred twenty-one".