121210000000000 has 968 divisors, whose sum is σ = 345431242925568. Its totient is φ = 42240000000000.

The previous prime is 121209999999967. The next prime is 121210000000087. The reversal of 121210000000000 is 12121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 3909999999985 + ... + 3910000000015.

Almost surely, 2^{121210000000000} is an apocalyptic number.

121210000000000 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 121210000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172715621462784).

121210000000000 is an abundant number, since it is smaller than the sum of its proper divisors (224221242925568).

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

121210000000000 is an frugal number, since it uses more digits than its factorization.

121210000000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 121210000000000 its reverse (12121), we get a palindrome (121210000012121).

121210000000000 divided by its reverse (12121) gives a 10-th power (10000000000 = 10¹⁰).

The spelling of 121210000000000 in words is "one hundred twenty-one trillion, two hundred ten billion", and thus it is an aban number.