12001121122000 has 80 divisors (see below), whose sum is σ = 29019461666832. Its totient is φ = 4800324249600.

The previous prime is 12001121121959. The next prime is 12001121122031. The reversal of 12001121122000 is 22112110021.

It can be written as a sum of positive squares in 8 ways, for example, as 516667689616 + 11484453432384 = 718796^2 + 3388872^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 145192684 + ... + 145275316.

Almost surely, 2^{12001121122000} is an apocalyptic number.

12001121122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001121122000 is an abundant number, since it is smaller than the sum of its proper divisors (17018340544832).

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

12001121122000 is an equidigital number, since it uses as much as digits as its factorization.

12001121122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155273 (or 155257 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12001121122000 its reverse (22112110021), we get a palindrome (12023233232021).

The spelling of 12001121122000 in words is "twelve trillion, one billion, one hundred twenty-one million, one hundred twenty-two thousand".