121110111111012 has 48 divisors (see below), whose sum is σ = 289163479843392. Its totient is φ = 39431014318080.

The previous prime is 121110111110987. The next prime is 121110111111023. The reversal of 121110111111012 is 210111111011121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121110111110982 and 121110111111000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149306212 + ... + 150115172.

It is an arithmetic number, because the mean of its divisors is an integer number (6024239163404).

Almost surely, 2^{121110111111012} is an apocalyptic number.

121110111111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121110111111012 is an abundant number, since it is smaller than the sum of its proper divisors (168053368732380).

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

121110111111012 is a wasteful number, since it uses less digits than its factorization.

121110111111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099148 (or 1099146 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 121110111111012 its reverse (210111111011121), we get a palindrome (331221222122133).

The spelling of 121110111111012 in words is "one hundred twenty-one trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, twelve".