111221442135 has 24 divisors (see below), whose sum is σ = 195499103904. Its totient is φ = 58482634560.

The previous prime is 111221442133. The next prime is 111221442179. The reversal of 111221442135 is 531244122111.

111221442135 is a `hidden beast` number, since 1 + 11 + 221 + 4 + 421 + 3 + 5 = 666.

It is not a de Polignac number, because 111221442135 - 2¹ = 111221442133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111221442099 and 111221442108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221442133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17402352 + ... + 17408741.

It is an arithmetic number, because the mean of its divisors is an integer number (8145795996).

Almost surely, 2^111221442135 is an apocalyptic number.

111221442135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111221442135 is a deficient number, since it is larger than the sum of its proper divisors (84277661769).

111221442135 is a wasteful number, since it uses less digits than its factorization.

111221442135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34811175 (or 34811172 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

Adding to 111221442135 its reverse (531244122111), we get a palindrome (642465564246).

The spelling of 111221442135 in words is "one hundred eleven billion, two hundred twenty-one million, four hundred forty-two thousand, one hundred thirty-five".