11102120042 has 12 divisors (see below), whose sum is σ = 18032733990. Its totient is φ = 5124055248.

The previous prime is 11102120023. The next prime is 11102120059. The reversal of 11102120042 is 24002120111.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3489383041 + 7612737001 = 59071^2 + 87251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11102119999 and 11102120026.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16422917 + ... + 16423592.

Almost surely, 2^11102120042 is an apocalyptic number.

11102120042 is a deficient number, since it is larger than the sum of its proper divisors (6930613948).

11102120042 is a wasteful number, since it uses less digits than its factorization.

11102120042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32846537 (or 32846524 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11102120042 its reverse (24002120111), we get a palindrome (35104240153).

The spelling of 11102120042 in words is "eleven billion, one hundred two million, one hundred twenty thousand, forty-two".