161111102 has 4 divisors (see below), whose sum is σ = 241666656. Its totient is φ = 80555550.

The previous prime is 161111087. The next prime is 161111107. The reversal of 161111102 is 201111161.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161111107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40277774 + ... + 40277777.

It is an arithmetic number, because the mean of its divisors is an integer number (60416664).

Almost surely, 2^161111102 is an apocalyptic number.

161111102 is a deficient number, since it is larger than the sum of its proper divisors (80555554).

161111102 is an equidigital number, since it uses as much as digits as its factorization.

161111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80555553.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 161111102 is about 12692.9548175356. The cubic root of 161111102 is about 544.1372900859.

Adding to 161111102 its reverse (201111161), we get a palindrome (362222263).

The spelling of 161111102 in words is "one hundred sixty-one million, one hundred eleven thousand, one hundred two".