121111220110 has 8 divisors (see below), whose sum is σ = 218000196216. Its totient is φ = 48444488040.

The previous prime is 121111220107. The next prime is 121111220147. The reversal of 121111220110 is 11022111121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6055560996 + ... + 6055561015.

It is an arithmetic number, because the mean of its divisors is an integer number (27250024527).

Almost surely, 2^121111220110 is an apocalyptic number.

121111220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111220110 is a deficient number, since it is larger than the sum of its proper divisors (96888976106).

121111220110 is a wasteful number, since it uses less digits than its factorization.

121111220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111122018.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111220110 its reverse (11022111121), we get a palindrome (132133331231).

The spelling of 121111220110 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred ten".