121500023012000 has 96 divisors (see below), whose sum is σ = 299635319627280. Its totient is φ = 48419339596800.

The previous prime is 121500023011993. The next prime is 121500023012033. The reversal of 121500023012000 is 210320005121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23593985028496 + 97906037983504 = 4857364^2 + 9894748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121500023012000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55383119 + ... + 57535118.

Almost surely, 2^{121500023012000} is an apocalyptic number.

121500023012000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121500023012000 is an abundant number, since it is smaller than the sum of its proper divisors (178135296615280).

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

121500023012000 is a wasteful number, since it uses less digits than its factorization.

121500023012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112918531 (or 112918513 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 121500023012000 its reverse (210320005121), we get a palindrome (121710343017121).

The spelling of 121500023012000 in words is "one hundred twenty-one trillion, five hundred billion, twenty-three million, twelve thousand".