121220122110 has 16 divisors (see below), whose sum is σ = 290928293136. Its totient is φ = 32325365888.

The previous prime is 121220122109. The next prime is 121220122141. The reversal of 121220122110 is 11221022121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121220122110.

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 7 ways as a sum of consecutive naturals, for example, 2020335339 + ... + 2020335398.

It is an arithmetic number, because the mean of its divisors is an integer number (18183018321).

Almost surely, 2^121220122110 is an apocalyptic number.

121220122110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220122110 is an abundant number, since it is smaller than the sum of its proper divisors (169708171026).

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

121220122110 is a wasteful number, since it uses less digits than its factorization.

121220122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040670747.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121220122110 its reverse (11221022121), we get a palindrome (132441144231).

The spelling of 121220122110 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred ten".