1221003022 has 4 divisors (see below), whose sum is σ = 1831504536. Its totient is φ = 610501510.

The previous prime is 1221002963. The next prime is 1221003031. The reversal of 1221003022 is 2203001221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2203001221 = 277 ⋅7953073.

It is a junction number, because it is equal to n+sod(n) for n = 1221002993 and 1221003011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305250754 + ... + 305250757.

It is an arithmetic number, because the mean of its divisors is an integer number (457876134).

Almost surely, 2^1221003022 is an apocalyptic number.

1221003022 is a deficient number, since it is larger than the sum of its proper divisors (610501514).

1221003022 is an equidigital number, since it uses as much as digits as its factorization.

1221003022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610501513.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221003022 is about 34942.8536613712. The cubic root of 1221003022 is about 1068.8224802161.

Adding to 1221003022 its reverse (2203001221), we get a palindrome (3424004243).

The spelling of 1221003022 in words is "one billion, two hundred twenty-one million, three thousand, twenty-two".