110121110121978 has 12 divisors (see below), whose sum is σ = 238595738597658. Its totient is φ = 36707036707320.

The previous prime is 110121110121977. The next prime is 110121110122109. The reversal of 110121110121978 is 879121011121011.

It can be written as a sum of positive squares in only one way, i.e., 74335314534849 + 35785795587129 = 8621793^2 + 5982123^2 .

It is not an unprimeable number, because it can be changed into a prime (110121110121977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3058919725593 + ... + 3058919725628.

Almost surely, 2^{110121110121978} is an apocalyptic number.

110121110121978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

110121110121978 is an abundant number, since it is smaller than the sum of its proper divisors (128474628475680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

110121110121978 is a wasteful number, since it uses less digits than its factorization.

110121110121978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117839451229 (or 6117839451226 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 36.

Adding to 110121110121978 its reverse (879121011121011), we get a palindrome (989242121242989).

The spelling of 110121110121978 in words is "one hundred ten trillion, one hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, nine hundred seventy-eight".