121030020000 has 360 divisors, whose sum is σ = 431257406580. Its totient is φ = 32186880000.

The previous prime is 121030019953. The next prime is 121030020019. The reversal of 121030020000 is 20030121.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 2360793744 + 118669226256 = 48588^2 + 344484^2 .

It is a tau number, because it is divible by the number of its divisors (360).

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 (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 91619340 + ... + 91620660.

Almost surely, 2^121030020000 is an apocalyptic number.

121030020000 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 121030020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215628703290).

121030020000 is an abundant number, since it is smaller than the sum of its proper divisors (310227386580).

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

121030020000 is a wasteful number, since it uses less digits than its factorization.

121030020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 121030020000 its reverse (20030121), we get a palindrome (121050050121).

The spelling of 121030020000 in words is "one hundred twenty-one billion, thirty million, twenty thousand".