11111221331042 has 16 divisors (see below), whose sum is σ = 19047851827200. Its totient is φ = 4761941041248.

The previous prime is 11111221331009. The next prime is 11111221331051. The reversal of 11111221331042 is 24013312211111.

It is a junction number, because it is equal to n+sod(n) for n = 11111221330999 and 11111221331017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9420959 + ... + 10534557.

It is an arithmetic number, because the mean of its divisors is an integer number (1190490739200).

Almost surely, 2^{11111221331042} is an apocalyptic number.

11111221331042 is a deficient number, since it is larger than the sum of its proper divisors (7936630496158).

11111221331042 is a wasteful number, since it uses less digits than its factorization.

11111221331042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826305.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 11111221331042 its reverse (24013312211111), we get a palindrome (35124533542153).

The spelling of 11111221331042 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, three hundred thirty-one thousand, forty-two".