111053521 has 2 divisors, whose sum is σ = 111053522. Its totient is φ = 111053520.

The previous prime is 111053519. The next prime is 111053549. The reversal of 111053521 is 125350111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111007296 + 46225 = 10536^2 + 215^2 .

It is an emirp because it is prime and its reverse (125350111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111053521 - 2¹ = 111053519 is a prime.

Together with 111053519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111053561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55526760 + 55526761.

It is an arithmetic number, because the mean of its divisors is an integer number (55526761).

Almost surely, 2^111053521 is an apocalyptic number.

It is an amenable number.

111053521 is a deficient number, since it is larger than the sum of its proper divisors (1).

111053521 is an equidigital number, since it uses as much as digits as its factorization.

111053521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 111053521 is about 10538.1934410031. The cubic root of 111053521 is about 480.6667831018. Note that the first 3 decimals are identical.

The spelling of 111053521 in words is "one hundred eleven million, fifty-three thousand, five hundred twenty-one".