111651040442 has 4 divisors (see below), whose sum is σ = 167476560666. Its totient is φ = 55825520220.

The previous prime is 111651040429. The next prime is 111651040447. The reversal of 111651040442 is 244040156111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244040156111 = 353 ⋅691331887.

It can be written as a sum of positive squares in only one way, i.e., 89515254481 + 22135785961 = 299191^2 + 148781^2 .

It is a super-2 number, since 2×111651040442² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111651040447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27912760109 + ... + 27912760112.

Almost surely, 2^111651040442 is an apocalyptic number.

111651040442 is a deficient number, since it is larger than the sum of its proper divisors (55825520224).

111651040442 is an equidigital number, since it uses as much as digits as its factorization.

111651040442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55825520223.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 111651040442 its reverse (244040156111), we get a palindrome (355691196553).

The spelling of 111651040442 in words is "one hundred eleven billion, six hundred fifty-one million, forty thousand, four hundred forty-two".