111155224442 has 4 divisors (see below), whose sum is σ = 166732836666. Its totient is φ = 55577612220.

The previous prime is 111155224399. The next prime is 111155224451. The reversal of 111155224442 is 244422551111.

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

It can be written as a sum of positive squares in only one way, i.e., 80150705881 + 31004518561 = 283109^2 + 176081^2 .

It is a super-2 number, since 2×111155224442² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111155224399 and 111155224408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27788806109 + ... + 27788806112.

Almost surely, 2^111155224442 is an apocalyptic number.

111155224442 is a deficient number, since it is larger than the sum of its proper divisors (55577612224).

111155224442 is an equidigital number, since it uses as much as digits as its factorization.

111155224442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55577612223.

The product of its digits is 12800, while the sum is 32.

Adding to 111155224442 its reverse (244422551111), we get a palindrome (355577775553).

The spelling of 111155224442 in words is "one hundred eleven billion, one hundred fifty-five million, two hundred twenty-four thousand, four hundred forty-two".