121003541500 has 48 divisors (see below), whose sum is σ = 265524438816. Its totient is φ = 48171984000.

The previous prime is 121003541431. The next prime is 121003541501. The reversal of 121003541500 is 5145300121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003541501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467977 + ... + 678976.

It is an arithmetic number, because the mean of its divisors is an integer number (5531759142).

Almost surely, 2^121003541500 is an apocalyptic number.

121003541500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121003541500 is an abundant number, since it is smaller than the sum of its proper divisors (144520897316).

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

121003541500 is a wasteful number, since it uses less digits than its factorization.

121003541500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147183 (or 1147171 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 121003541500 its reverse (5145300121), we get a palindrome (126148841621).

The spelling of 121003541500 in words is "one hundred twenty-one billion, three million, five hundred forty-one thousand, five hundred".