111221112042 has 64 divisors (see below), whose sum is σ = 249623337600. Its totient is φ = 36705726720.

The previous prime is 111221111993. The next prime is 111221112043. The reversal of 111221112042 is 240211122111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111221112043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2193634 + ... + 2243762.

It is an arithmetic number, because the mean of its divisors is an integer number (3900364650).

Almost surely, 2^111221112042 is an apocalyptic number.

111221112042 is an abundant number, since it is smaller than the sum of its proper divisors (138402225558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111221112042 is a wasteful number, since it uses less digits than its factorization.

111221112042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50548 (or 50542 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221112042 its reverse (240211122111), we get a palindrome (351432234153).

The spelling of 111221112042 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, forty-two".