1221222033 has 6 divisors (see below), whose sum is σ = 1763987394. Its totient is φ = 814148016.

The previous prime is 1221222031. The next prime is 1221222089. The reversal of 1221222033 is 3302221221.

It can be written as a sum of positive squares in only one way, i.e., 1154096784 + 67125249 = 33972^2 + 8193^2 .

It is not a de Polignac number, because 1221222033 - 2¹ = 1221222031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221221997 and 1221222015.

It is not an unprimeable number, because it can be changed into a prime (1221222031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67845660 + ... + 67845677.

It is an arithmetic number, because the mean of its divisors is an integer number (293997899).

Almost surely, 2^1221222033 is an apocalyptic number.

It is an amenable number.

1221222033 is a deficient number, since it is larger than the sum of its proper divisors (542765361).

1221222033 is a wasteful number, since it uses less digits than its factorization.

1221222033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135691343 (or 135691340 counting only the distinct ones).

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

The square root of 1221222033 is about 34945.9873662199. The cubic root of 1221222033 is about 1068.8863812006.

Adding to 1221222033 its reverse (3302221221), we get a palindrome (4523443254).

The spelling of 1221222033 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, thirty-three".