121220101110 has 32 divisors (see below), whose sum is σ = 292087337472. Its totient is φ = 32196572000.

The previous prime is 121220101091. The next prime is 121220101141. The reversal of 121220101110 is 11101022121.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8041614 + ... + 8056673.

It is an arithmetic number, because the mean of its divisors is an integer number (9127729296).

Almost surely, 2^121220101110 is an apocalyptic number.

121220101110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220101110 is an abundant number, since it is smaller than the sum of its proper divisors (170867236362).

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

121220101110 is a wasteful number, since it uses less digits than its factorization.

121220101110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16098548.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121220101110 its reverse (11101022121), we get a palindrome (132321123231).

The spelling of 121220101110 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred one thousand, one hundred ten".