121133120240 has 80 divisors (see below), whose sum is σ = 307301911776. Its totient is φ = 44039193600.

The previous prime is 121133120219. The next prime is 121133120243. The reversal of 121133120240 is 42021331121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133120243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5315270 + ... + 5338010.

Almost surely, 2^121133120240 is an apocalyptic number.

121133120240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121133120240 is an abundant number, since it is smaller than the sum of its proper divisors (186168791536).

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

121133120240 is a wasteful number, since it uses less digits than its factorization.

121133120240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28818 (or 28812 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121133120240 its reverse (42021331121), we get a palindrome (163154451361).

The spelling of 121133120240 in words is "one hundred twenty-one billion, one hundred thirty-three million, one hundred twenty thousand, two hundred forty".