121320210000 has 200 divisors, whose sum is σ = 427242413664. Its totient is φ = 29410880000.

The previous prime is 121320209977. The next prime is 121320210017. The reversal of 121320210000 is 12023121.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 39 ways as a sum of consecutive naturals, for example, 146182 + ... + 513818.

Almost surely, 2^121320210000 is an apocalyptic number.

121320210000 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 121320210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213621206832).

121320210000 is an abundant number, since it is smaller than the sum of its proper divisors (305922203664).

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

121320210000 is a wasteful number, since it uses less digits than its factorization.

121320210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367679 (or 367658 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121320210000 its reverse (12023121), we get a palindrome (121332233121).

The spelling of 121320210000 in words is "one hundred twenty-one billion, three hundred twenty million, two hundred ten thousand".