1221132041 has 2 divisors, whose sum is σ = 1221132042. Its totient is φ = 1221132040.

The previous prime is 1221132019. The next prime is 1221132113. The reversal of 1221132041 is 1402311221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177519225 + 43612816 = 34315^2 + 6604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221132041 - 2¹⁴ = 1221115657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221132541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610566020 + 610566021.

It is an arithmetic number, because the mean of its divisors is an integer number (610566021).

Almost surely, 2^1221132041 is an apocalyptic number.

It is an amenable number.

1221132041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221132041 is an equidigital number, since it uses as much as digits as its factorization.

1221132041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221132041 is about 34944.6997554708. The cubic root of 1221132041 is about 1068.8601250999.

Adding to 1221132041 its reverse (1402311221), we get a palindrome (2623443262).

The spelling of 1221132041 in words is "one billion, two hundred twenty-one million, one hundred thirty-two thousand, forty-one".