1001220241 has 4 divisors (see below), whose sum is σ = 1144251712. Its totient is φ = 858188772.

The previous prime is 1001220229. The next prime is 1001220247. The reversal of 1001220241 is 1420221001.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1420221001 = 251 ⋅5658251.

It is not a de Polignac number, because 1001220241 - 2²¹ = 999123089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001220247) 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, 71515725 + ... + 71515738.

It is an arithmetic number, because the mean of its divisors is an integer number (286062928).

Almost surely, 2^1001220241 is an apocalyptic number.

It is an amenable number.

1001220241 is a deficient number, since it is larger than the sum of its proper divisors (143031471).

1001220241 is an equidigital number, since it uses as much as digits as its factorization.

1001220241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143031470.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1001220241 is about 31642.0644238014. The cubic root of 1001220241 is about 1000.4065816689.

Adding to 1001220241 its reverse (1420221001), we get a palindrome (2421441242).

The spelling of 1001220241 in words is "one billion, one million, two hundred twenty thousand, two hundred forty-one".