121221212100110 has 16 divisors (see below), whose sum is σ = 218481924553200. Its totient is φ = 48425430890496.

The previous prime is 121221212100097. The next prime is 121221212100133. The reversal of 121221212100110 is 11001212122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7881735620 + ... + 7881750999.

It is an arithmetic number, because the mean of its divisors is an integer number (13655120284575).

Almost surely, 2^{121221212100110} is an apocalyptic number.

121221212100110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221212100110 is a deficient number, since it is larger than the sum of its proper divisors (97260712453090).

121221212100110 is a wasteful number, since it uses less digits than its factorization.

121221212100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15763487395.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221212100110 its reverse (11001212122121), we get a palindrome (132222424222231).

The spelling of 121221212100110 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred thousand, one hundred ten".