111405125641 has 2 divisors, whose sum is σ = 111405125642. Its totient is φ = 111405125640.

The previous prime is 111405125581. The next prime is 111405125669. The reversal of 111405125641 is 146521504111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78752635641 + 32652490000 = 280629^2 + 180700^2 .

It is a cyclic number.

It is not a de Polignac number, because 111405125641 - 2³³ = 102815191049 is a prime.

It is a super-2 number, since 2×111405125641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111405128641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55702562820 + 55702562821.

It is an arithmetic number, because the mean of its divisors is an integer number (55702562821).

Almost surely, 2^111405125641 is an apocalyptic number.

It is an amenable number.

111405125641 is a deficient number, since it is larger than the sum of its proper divisors (1).

111405125641 is an equidigital number, since it uses as much as digits as its factorization.

111405125641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 31.

Adding to 111405125641 its reverse (146521504111), we get a palindrome (257926629752).

The spelling of 111405125641 in words is "one hundred eleven billion, four hundred five million, one hundred twenty-five thousand, six hundred forty-one".