111211002442 has 4 divisors (see below), whose sum is σ = 166816503666. Its totient is φ = 55605501220.

The previous prime is 111211002439. The next prime is 111211002451. The reversal of 111211002442 is 244200112111.

It is a happy number.

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., 104555869201 + 6655133241 = 323351^2 + 81579^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27802750609 + ... + 27802750612.

Almost surely, 2^111211002442 is an apocalyptic number.

111211002442 is a deficient number, since it is larger than the sum of its proper divisors (55605501224).

111211002442 is an equidigital number, since it uses as much as digits as its factorization.

111211002442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55605501223.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111211002442 its reverse (244200112111), we get a palindrome (355411114553).

The spelling of 111211002442 in words is "one hundred eleven billion, two hundred eleven million, two thousand, four hundred forty-two".