1241020221 has 32 divisors (see below), whose sum is σ = 1921489920. Its totient is φ = 697797504.

The previous prime is 1241020201. The next prime is 1241020237. The reversal of 1241020221 is 1220201421.

It is not a de Polignac number, because 1241020221 - 2¹⁵ = 1240987453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1241020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985090 + ... + 986348.

It is an arithmetic number, because the mean of its divisors is an integer number (60046560).

Almost surely, 2^1241020221 is an apocalyptic number.

It is an amenable number.

1241020221 is a deficient number, since it is larger than the sum of its proper divisors (680469699).

1241020221 is a wasteful number, since it uses less digits than its factorization.

1241020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1241020221 is about 35228.1169096505. The cubic root of 1241020221 is about 1074.6316303385.

Adding to 1241020221 its reverse (1220201421), we get a palindrome (2461221642).

The spelling of 1241020221 in words is "one billion, two hundred forty-one million, twenty thousand, two hundred twenty-one".