1221030344 has 16 divisors (see below), whose sum is σ = 2302083420. Its totient is φ = 607141440.

The previous prime is 1221030331. The next prime is 1221030359. The reversal of 1221030344 is 4430301221.

It can be written as a sum of positive squares in 2 ways, for example, as 1220104900 + 925444 = 34930^2 + 962^2 .

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, 420179 + ... + 423074.

Almost surely, 2^1221030344 is an apocalyptic number.

It is an amenable number.

1221030344 is a deficient number, since it is larger than the sum of its proper divisors (1081053076).

1221030344 is a wasteful number, since it uses less digits than its factorization.

1221030344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843440 (or 843436 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1221030344 is about 34943.2446117987. The cubic root of 1221030344 is about 1068.8304523912.

Adding to 1221030344 its reverse (4430301221), we get a palindrome (5651331565).

The spelling of 1221030344 in words is "one billion, two hundred twenty-one million, thirty thousand, three hundred forty-four".