121101220110 has 32 divisors (see below), whose sum is σ = 313000077600. Its totient is φ = 29809531008.

The previous prime is 121101220109. The next prime is 121101220117. The reversal of 121101220110 is 11022101121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101220117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155257585 + ... + 155258364.

It is an arithmetic number, because the mean of its divisors is an integer number (9781252425).

Almost surely, 2^121101220110 is an apocalyptic number.

121101220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121101220110 is an abundant number, since it is smaller than the sum of its proper divisors (191898857490).

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

121101220110 is a wasteful number, since it uses less digits than its factorization.

121101220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310515972.

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

Adding to 121101220110 its reverse (11022101121), we get a palindrome (132123321231).

The spelling of 121101220110 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred ten".