121212120012000 has 192 divisors, whose sum is σ = 397355868000000. Its totient is φ = 32301664012800.

The previous prime is 121212120011999. The next prime is 121212120012017. The reversal of 121212120012000 is 210021212121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 14618751 + ... + 21357249.

It is an arithmetic number, because the mean of its divisors is an integer number (2069561812500).

Almost surely, 2^{121212120012000} is an apocalyptic number.

121212120012000 is a gapful number since it is divisible by the number (10) 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 121212120012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198677934000000).

121212120012000 is an abundant number, since it is smaller than the sum of its proper divisors (276143747988000).

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

121212120012000 is a wasteful number, since it uses less digits than its factorization.

121212120012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740026 (or 6740008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121212120012000 its reverse (210021212121), we get a palindrome (121422141224121).

The spelling of 121212120012000 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty million, twelve thousand".