121121110220110 has 512 divisors, whose sum is σ = 306102808166400. Its totient is φ = 33560129433600.

The previous prime is 121121110220087. The next prime is 121121110220189. The reversal of 121121110220110 is 11022011121121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 14366157595 + ... + 14366166025.

It is an arithmetic number, because the mean of its divisors is an integer number (597857047200).

Almost surely, 2^{121121110220110} is an apocalyptic number.

121121110220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121110220110 is an abundant number, since it is smaller than the sum of its proper divisors (184981697946290).

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

121121110220110 is a wasteful number, since it uses less digits than its factorization.

121121110220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929 (or 8907 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 121121110220110 its reverse (11022011121121), we get a palindrome (132143121341231).

The spelling of 121121110220110 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, one hundred ten".