1201221033 has 4 divisors (see below), whose sum is σ = 1601628048. Its totient is φ = 800814020.

The previous prime is 1201221031. The next prime is 1201221041. The reversal of 1201221033 is 3301221021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201221033 - 2¹ = 1201221031 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201221031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200203503 + ... + 200203508.

It is an arithmetic number, because the mean of its divisors is an integer number (400407012).

Almost surely, 2^1201221033 is an apocalyptic number.

It is an amenable number.

1201221033 is a deficient number, since it is larger than the sum of its proper divisors (400407015).

1201221033 is an equidigital number, since it uses as much as digits as its factorization.

1201221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400407014.

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

The square root of 1201221033 is about 34658.6357636881. The cubic root of 1201221033 is about 1063.0188751089.

Adding to 1201221033 its reverse (3301221021), we get a palindrome (4502442054).

The spelling of 1201221033 in words is "one billion, two hundred one million, two hundred twenty-one thousand, thirty-three".