111251622131641 has 4 divisors (see below), whose sum is σ = 111337398248692. Its totient is φ = 111165846014592.

The previous prime is 111251622131609. The next prime is 111251622131651. The reversal of 111251622131641 is 146131226152111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110643891187600 + 607730944041 = 10518740^2 + 779571^2 .

It is a cyclic number.

It is not a de Polignac number, because 111251622131641 - 2⁵ = 111251622131609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111251622131641.

It is not an unprimeable number, because it can be changed into a prime (111251622131651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42888056580 + ... + 42888059173.

It is an arithmetic number, because the mean of its divisors is an integer number (27834349562173).

Almost surely, 2^{111251622131641} is an apocalyptic number.

It is an amenable number.

111251622131641 is a deficient number, since it is larger than the sum of its proper divisors (85776117051).

111251622131641 is an equidigital number, since it uses as much as digits as its factorization.

111251622131641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85776117050.

The product of its digits is 17280, while the sum is 37.

Adding to 111251622131641 its reverse (146131226152111), we get a palindrome (257382848283752).

The spelling of 111251622131641 in words is "one hundred eleven trillion, two hundred fifty-one billion, six hundred twenty-two million, one hundred thirty-one thousand, six hundred forty-one".