121228143120 has 240 divisors, whose sum is σ = 467724920832. Its totient is φ = 27563996160.

The previous prime is 121228143119. The next prime is 121228143167. The reversal of 121228143120 is 21341822121.

It is a happy number.

121228143120 is a `hidden beast` number, since 1 + 2 + 1 + 228 + 1 + 431 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 899674 + ... + 1025606.

Almost surely, 2^121228143120 is an apocalyptic number.

121228143120 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 121228143120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233862460416).

121228143120 is an abundant number, since it is smaller than the sum of its proper divisors (346496777712).

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

121228143120 is a wasteful number, since it uses less digits than its factorization.

121228143120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126150 (or 126141 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 121228143120 its reverse (21341822121), we get a palindrome (142569965241).

The spelling of 121228143120 in words is "one hundred twenty-one billion, two hundred twenty-eight million, one hundred forty-three thousand, one hundred twenty".