121123311103212 has 96 divisors (see below), whose sum is σ = 310209144505344. Its totient is φ = 36479089996800.

The previous prime is 121123311103139. The next prime is 121123311103297. The reversal of 121123311103212 is 212301113321121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9927412 + ... + 18460772.

It is an arithmetic number, because the mean of its divisors is an integer number (3231345255264).

Almost surely, 2^{121123311103212} is an apocalyptic number.

121123311103212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121123311103212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155104572252672).

121123311103212 is an abundant number, since it is smaller than the sum of its proper divisors (189085833402132).

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

121123311103212 is a wasteful number, since it uses less digits than its factorization.

121123311103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8534039 (or 8534037 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 121123311103212 its reverse (212301113321121), we get a palindrome (333424424424333).

The spelling of 121123311103212 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, three hundred eleven million, one hundred three thousand, two hundred twelve".