12121122112104 has 32 divisors (see below), whose sum is σ = 30302951408640. Its totient is φ = 4040354553600.

The previous prime is 12121122112103. The next prime is 12121122112123. The reversal of 12121122112104 is 40121122112121.

It is not an unprimeable number, because it can be changed into a prime (12121122112103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4389849 + ... + 6596439.

It is an arithmetic number, because the mean of its divisors is an integer number (946967231520).

Almost surely, 2^{12121122112104} is an apocalyptic number.

It is an amenable number.

12121122112104 is an abundant number, since it is smaller than the sum of its proper divisors (18181829296536).

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

12121122112104 is a wasteful number, since it uses less digits than its factorization.

12121122112104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435481 (or 2435477 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 12121122112104 its reverse (40121122112121), we get a palindrome (52242244224225).

The spelling of 12121122112104 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred four".