111122341021 has 4 divisors (see below), whose sum is σ = 111123301212. Its totient is φ = 111121380832.

The previous prime is 111122341007. The next prime is 111122341039. The reversal of 111122341021 is 120143221111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120143221111 = 7331 ⋅16388381.

It can be written as a sum of positive squares in 2 ways, for example, as 47825316100 + 63297024921 = 218690^2 + 251589^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122341021 - 2⁹ = 111122340509 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 111122341021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122341091) 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, 278200 + ... + 547393.

It is an arithmetic number, because the mean of its divisors is an integer number (27780825303).

Almost surely, 2^111122341021 is an apocalyptic number.

It is an amenable number.

111122341021 is a deficient number, since it is larger than the sum of its proper divisors (960191).

111122341021 is an equidigital number, since it uses as much as digits as its factorization.

111122341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960190.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 111122341021 its reverse (120143221111), we get a palindrome (231265562132).

It can be divided in two parts, 11112234 and 1021, that added together give a triangular number (11113255 = T₄₇₁₄).

The spelling of 111122341021 in words is "one hundred eleven billion, one hundred twenty-two million, three hundred forty-one thousand, twenty-one".