1020221201 has 4 divisors (see below), whose sum is σ = 1020297252. Its totient is φ = 1020145152.

The previous prime is 1020221179. The next prime is 1020221231. The reversal of 1020221201 is 1021220201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1021220201 = 43 ⋅23749307.

It can be written as a sum of positive squares in 2 ways, for example, as 655411201 + 364810000 = 25601^2 + 19100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020221201 - 2²² = 1016026897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11936 + ... + 46721.

It is an arithmetic number, because the mean of its divisors is an integer number (255074313).

Almost surely, 2^1020221201 is an apocalyptic number.

It is an amenable number.

1020221201 is a deficient number, since it is larger than the sum of its proper divisors (76051).

1020221201 is an equidigital number, since it uses as much as digits as its factorization.

1020221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76050.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1020221201 is about 31940.9016935966. The cubic root of 1020221201 is about 1006.6954709509.

Adding to 1020221201 its reverse (1021220201), we get a palindrome (2041441402).

The spelling of 1020221201 in words is "one billion, twenty million, two hundred twenty-one thousand, two hundred one".