121111101112010 has 16 divisors (see below), whose sum is σ = 218029138212456. Its totient is φ = 48437961286848.

The previous prime is 121111101111977. The next prime is 121111101112019. The reversal of 121111101112010 is 10211101111121.

It can be written as a sum of positive squares in 4 ways, for example, as 114375046669129 + 6736054442881 = 10694627^2 + 2595391^2 .

It is not an unprimeable number, because it can be changed into a prime (121111101112019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809816237 + ... + 809965776.

Almost surely, 2^{121111101112010} is an apocalyptic number.

121111101112010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111101112010 is a deficient number, since it is larger than the sum of its proper divisors (96918037100446).

121111101112010 is a wasteful number, since it uses less digits than its factorization.

121111101112010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619789497.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 121111101112010 its reverse (10211101111121), we get a palindrome (131322202223131).

The spelling of 121111101112010 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred one million, one hundred twelve thousand, ten".