121102020000 has 720 divisors, whose sum is σ = 478300394880. Its totient is φ = 29787264000.

The previous prime is 121102019989. The next prime is 121102020019. The reversal of 121102020000 is 20201121.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 91259337 + ... + 91260663.

It is an arithmetic number, because the mean of its divisors is an integer number (664306104).

Almost surely, 2^121102020000 is an apocalyptic number.

121102020000 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 121102020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239150197440).

121102020000 is an abundant number, since it is smaller than the sum of its proper divisors (357198374880).

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

121102020000 is a wasteful number, since it uses less digits than its factorization.

121102020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121102020000 its reverse (20201121), we get a palindrome (121122221121).

The spelling of 121102020000 in words is "one hundred twenty-one billion, one hundred two million, twenty thousand".