201241502123 has 4 divisors (see below), whose sum is σ = 213079237560. Its totient is φ = 189403766688.

The previous prime is 201241502053. The next prime is 201241502141. The reversal of 201241502123 is 321205142102.

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 201241502123 - 2¹⁰ = 201241501099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201241502723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5918867693 + ... + 5918867726.

It is an arithmetic number, because the mean of its divisors is an integer number (53269809390).

Almost surely, 2^201241502123 is an apocalyptic number.

201241502123 is a deficient number, since it is larger than the sum of its proper divisors (11837735437).

201241502123 is a wasteful number, since it uses less digits than its factorization.

201241502123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11837735436.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 201241502123 its reverse (321205142102), we get a palindrome (522446644225).

The spelling of 201241502123 in words is "two hundred one billion, two hundred forty-one million, five hundred two thousand, one hundred twenty-three".