1221003122 has 8 divisors (see below), whose sum is σ = 1835008176. Its totient is φ = 609333732.

The previous prime is 1221003101. The next prime is 1221003131. The reversal of 1221003122 is 2213001221.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221003097 and 1221003106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582608 + ... + 584699.

It is an arithmetic number, because the mean of its divisors is an integer number (229376022).

Almost surely, 2^1221003122 is an apocalyptic number.

1221003122 is a deficient number, since it is larger than the sum of its proper divisors (614005054).

1221003122 is a wasteful number, since it uses less digits than its factorization.

1221003122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167832.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221003122 is about 34942.8550922789. The cubic root of 1221003122 is about 1068.8225093949.

Adding to 1221003122 its reverse (2213001221), we get a palindrome (3434004343).

The spelling of 1221003122 in words is "one billion, two hundred twenty-one million, three thousand, one hundred twenty-two".