111521514061 has 2 divisors, whose sum is σ = 111521514062. Its totient is φ = 111521514060.

The previous prime is 111521514059. The next prime is 111521514157. The reversal of 111521514061 is 160415125111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105332702500 + 6188811561 = 324550^2 + 78669^2 .

It is a cyclic number.

It is not a de Polignac number, because 111521514061 - 2¹ = 111521514059 is a prime.

Together with 111521514059, 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 (111521514361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55760757030 + 55760757031.

It is an arithmetic number, because the mean of its divisors is an integer number (55760757031).

Almost surely, 2^111521514061 is an apocalyptic number.

It is an amenable number.

111521514061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111521514061 is an equidigital number, since it uses as much as digits as its factorization.

111521514061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 111521514061 its reverse (160415125111), we get a palindrome (271936639172).

The spelling of 111521514061 in words is "one hundred eleven billion, five hundred twenty-one million, five hundred fourteen thousand, sixty-one".