107511221 has 2 divisors, whose sum is σ = 107511222. Its totient is φ = 107511220.

The previous prime is 107511203. The next prime is 107511241. The reversal of 107511221 is 122115701.

It is a happy number.

It is an a-pointer prime, because the next prime (107511241) can be obtained adding 107511221 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 51051025 = 7514^2 + 7145^2 .

It is a cyclic number.

It is not a de Polignac number, because 107511221 - 2²⁶ = 40402357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 107511193 and 107511202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107511241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53755610 + 53755611.

It is an arithmetic number, because the mean of its divisors is an integer number (53755611).

Almost surely, 2^107511221 is an apocalyptic number.

It is an amenable number.

107511221 is a deficient number, since it is larger than the sum of its proper divisors (1).

107511221 is an equidigital number, since it uses as much as digits as its factorization.

107511221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 107511221 is about 10368.7617872145. The cubic root of 107511221 is about 475.5008139812.

Adding to 107511221 its reverse (122115701), we get a palindrome (229626922).

The spelling of 107511221 in words is "one hundred seven million, five hundred eleven thousand, two hundred twenty-one".