221132077 has 2 divisors, whose sum is σ = 221132078. Its totient is φ = 221132076.

The previous prime is 221132071. The next prime is 221132117. The reversal of 221132077 is 770231122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213481321 + 7650756 = 14611^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 221132077 - 2³ = 221132069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221132071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110566038 + 110566039.

It is an arithmetic number, because the mean of its divisors is an integer number (110566039).

Almost surely, 2^221132077 is an apocalyptic number.

It is an amenable number.

221132077 is a deficient number, since it is larger than the sum of its proper divisors (1).

221132077 is an equidigital number, since it uses as much as digits as its factorization.

221132077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 221132077 is about 14870.5103140410. The cubic root of 221132077 is about 604.7147775604.

Adding to 221132077 its reverse (770231122), we get a palindrome (991363199).

The spelling of 221132077 in words is "two hundred twenty-one million, one hundred thirty-two thousand, seventy-seven".