1220020133 has 4 divisors (see below), whose sum is σ = 1221412140. Its totient is φ = 1218628128.

The previous prime is 1220020127. The next prime is 1220020163. The reversal of 1220020133 is 3310200221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3310200221 = 10949 ⋅302329.

It can be written as a sum of positive squares in 2 ways, for example, as 691847809 + 528172324 = 26303^2 + 22982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220020133 - 2¹⁶ = 1219954597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220020163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694688 + ... + 696441.

It is an arithmetic number, because the mean of its divisors is an integer number (305353035).

Almost surely, 2^1220020133 is an apocalyptic number.

It is an amenable number.

1220020133 is a deficient number, since it is larger than the sum of its proper divisors (1392007).

1220020133 is an equidigital number, since it uses as much as digits as its factorization.

1220020133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392006.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1220020133 is about 34928.7865950136. The cubic root of 1220020133 is about 1068.5356079059.

Adding to 1220020133 its reverse (3310200221), we get a palindrome (4530220354).

The spelling of 1220020133 in words is "one billion, two hundred twenty million, twenty thousand, one hundred thirty-three".