121531340000 has 120 divisors (see below), whose sum is σ = 341697909168. Its totient is φ = 41667840000.

The previous prime is 121531339987. The next prime is 121531340033. The reversal of 121531340000 is 43135121.

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

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 294041 + ... + 574040.

Almost surely, 2^121531340000 is an apocalyptic number.

121531340000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121531340000 is an abundant number, since it is smaller than the sum of its proper divisors (220166569168).

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

121531340000 is an frugal number, since it uses more digits than its factorization.

121531340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868118 (or 868095 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 121531340000 its reverse (43135121), we get a palindrome (121574475121).

The spelling of 121531340000 in words is "one hundred twenty-one billion, five hundred thirty-one million, three hundred forty thousand".