121500100523 has 4 divisors (see below), whose sum is σ = 121914776928. Its totient is φ = 121085424120.

The previous prime is 121500100507. The next prime is 121500100543. The reversal of 121500100523 is 325001005121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121500100523 - 2⁴ = 121500100507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121500100495 and 121500100504.

It is not an unprimeable number, because it can be changed into a prime (121500100543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207337763 + ... + 207338348.

It is an arithmetic number, because the mean of its divisors is an integer number (30478694232).

Almost surely, 2^121500100523 is an apocalyptic number.

121500100523 is a deficient number, since it is larger than the sum of its proper divisors (414676405).

121500100523 is an equidigital number, since it uses as much as digits as its factorization.

121500100523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414676404.

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 121500100523 its reverse (325001005121), we get a palindrome (446501105644).

The spelling of 121500100523 in words is "one hundred twenty-one billion, five hundred million, one hundred thousand, five hundred twenty-three".