1221222303 has 24 divisors (see below), whose sum is σ = 2019197856. Its totient is φ = 696729600.

The previous prime is 1221222287. The next prime is 1221222341. The reversal of 1221222303 is 3032221221.

It is not a de Polignac number, because 1221222303 - 2⁴ = 1221222287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221222203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25263 + ... + 55503.

It is an arithmetic number, because the mean of its divisors is an integer number (84133244).

Almost surely, 2^1221222303 is an apocalyptic number.

1221222303 is a deficient number, since it is larger than the sum of its proper divisors (797975553).

1221222303 is a wasteful number, since it uses less digits than its factorization.

1221222303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30895 (or 30892 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221222303 is about 34945.9912293241. The cubic root of 1221222303 is about 1068.8864599740.

Adding to 1221222303 its reverse (3032221221), we get a palindrome (4253443524).

The spelling of 1221222303 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, three hundred three".