201023232123 has 16 divisors (see below), whose sum is σ = 306332907776. Its totient is φ = 114865996320.

The previous prime is 201023232107. The next prime is 201023232161. The reversal of 201023232123 is 321232320102.

It is a happy number.

It is not a de Polignac number, because 201023232123 - 2⁴ = 201023232107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 201023232123.

It is not an unprimeable number, because it can be changed into a prime (201023237123) 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 15 ways as a sum of consecutive naturals, for example, 420393 + ... + 760773.

It is an arithmetic number, because the mean of its divisors is an integer number (19145806736).

Almost surely, 2^201023232123 is an apocalyptic number.

201023232123 is a deficient number, since it is larger than the sum of its proper divisors (105309675653).

201023232123 is a wasteful number, since it uses less digits than its factorization.

201023232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368514.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 201023232123 its reverse (321232320102), we get a palindrome (522255552225).

The spelling of 201023232123 in words is "two hundred one billion, twenty-three million, two hundred thirty-two thousand, one hundred twenty-three".