121102111120 has 20 divisors (see below), whose sum is σ = 281562408540. Its totient is φ = 48440844416.

The previous prime is 121102111093. The next prime is 121102111121. The reversal of 121102111120 is 21111201121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16987472896 + 104114638224 = 130336^2 + 322668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 121102111120.

It is not an unprimeable number, because it can be changed into a prime (121102111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756888115 + ... + 756888274.

It is an arithmetic number, because the mean of its divisors is an integer number (14078120427).

Almost surely, 2^121102111120 is an apocalyptic number.

121102111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102111120 is an abundant number, since it is smaller than the sum of its proper divisors (160460297420).

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

121102111120 is a wasteful number, since it uses less digits than its factorization.

121102111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513776402 (or 1513776396 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121102111120 its reverse (21111201121), we get a palindrome (142213312241).

Subtracting from 121102111120 its reverse (21111201121), we obtain a palindrome (99990909999).

The spelling of 121102111120 in words is "one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, one hundred twenty".