121230720000 has 660 divisors, whose sum is σ = 471362771880. Its totient is φ = 29822976000.

The previous prime is 121230719983. The next prime is 121230720019. The reversal of 121230720000 is 27032121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 74879191 + ... + 74880809.

It is an arithmetic number, because the mean of its divisors is an integer number (714186018).

Almost surely, 2^121230720000 is an apocalyptic number.

121230720000 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 121230720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235681385940).

121230720000 is an abundant number, since it is smaller than the sum of its proper divisors (350132051880).

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

121230720000 is a wasteful number, since it uses less digits than its factorization.

121230720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

Adding to 121230720000 its reverse (27032121), we get a palindrome (121257752121).

The spelling of 121230720000 in words is "one hundred twenty-one billion, two hundred thirty million, seven hundred twenty thousand".