111051021142 has 4 divisors (see below), whose sum is σ = 166576531716. Its totient is φ = 55525510570.

The previous prime is 111051021139. The next prime is 111051021157. The reversal of 111051021142 is 241120150111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241120150111 = 41 ⋅5880979271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27762755284 + ... + 27762755287.

It is an arithmetic number, because the mean of its divisors is an integer number (41644132929).

Almost surely, 2^111051021142 is an apocalyptic number.

111051021142 is a deficient number, since it is larger than the sum of its proper divisors (55525510574).

111051021142 is an equidigital number, since it uses as much as digits as its factorization.

111051021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55525510573.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 111051021142 its reverse (241120150111), we get a palindrome (352171171253).

The spelling of 111051021142 in words is "one hundred eleven billion, fifty-one million, twenty-one thousand, one hundred forty-two".