1211220033 has 16 divisors (see below), whose sum is σ = 1653129216. Its totient is φ = 788474960.

The previous prime is 1211220019. The next prime is 1211220047. The reversal of 1211220033 is 3300221121.

It is an interprime number because it is at equal distance from previous prime (1211220019) and next prime (1211220047).

It is a cyclic number.

It is not a de Polignac number, because 1211220033 - 2⁹ = 1211219521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211219994 and 1211220021.

It is not an unprimeable number, because it can be changed into a prime (1211220013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52768 + ... + 72158.

It is an arithmetic number, because the mean of its divisors is an integer number (103320576).

Almost surely, 2^1211220033 is an apocalyptic number.

It is an amenable number.

1211220033 is a deficient number, since it is larger than the sum of its proper divisors (441909183).

1211220033 is a wasteful number, since it uses less digits than its factorization.

1211220033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19884.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1211220033 is about 34802.5865849077. The cubic root of 1211220033 is about 1065.9602624384.

Adding to 1211220033 its reverse (3300221121), we get a palindrome (4511441154).

The spelling of 1211220033 in words is "one billion, two hundred eleven million, two hundred twenty thousand, thirty-three".