1230541221 has 48 divisors (see below), whose sum is σ = 2049717120. Its totient is φ = 642919680.

The previous prime is 1230541219. The next prime is 1230541223. The reversal of 1230541221 is 1221450321.

It is an interprime number because it is at equal distance from previous prime (1230541219) and next prime (1230541223).

It is not a de Polignac number, because 1230541221 - 2¹ = 1230541219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230541223) 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 47 ways as a sum of consecutive naturals, for example, 385251 + ... + 388431.

It is an arithmetic number, because the mean of its divisors is an integer number (42702440).

Almost surely, 2^1230541221 is an apocalyptic number.

It is an amenable number.

1230541221 is a deficient number, since it is larger than the sum of its proper divisors (819175899).

1230541221 is a wasteful number, since it uses less digits than its factorization.

1230541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326 (or 3313 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1230541221 is about 35079.0709825674. The cubic root of 1230541221 is about 1071.5983974639.

Adding to 1230541221 its reverse (1221450321), we get a palindrome (2451991542).

The spelling of 1230541221 in words is "one billion, two hundred thirty million, five hundred forty-one thousand, two hundred twenty-one".