1105331221 has 2 divisors, whose sum is σ = 1105331222. Its totient is φ = 1105331220.

The previous prime is 1105331219. The next prime is 1105331231. The reversal of 1105331221 is 1221335011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 217887121 = 29790^2 + 14761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105331221 - 2¹ = 1105331219 is a prime.

Together with 1105331219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105331231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552665610 + 552665611.

It is an arithmetic number, because the mean of its divisors is an integer number (552665611).

Almost surely, 2^1105331221 is an apocalyptic number.

It is an amenable number.

1105331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105331221 is an equidigital number, since it uses as much as digits as its factorization.

1105331221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1105331221 is about 33246.5219383923. The cubic root of 1105331221 is about 1033.9450992654.

Adding to 1105331221 its reverse (1221335011), we get a palindrome (2326666232).

The spelling of 1105331221 in words is "one billion, one hundred five million, three hundred thirty-one thousand, two hundred twenty-one".