201020031202123 has 64 divisors (see below), whose sum is σ = 247956677591040. Its totient is φ = 159113542879872.

The previous prime is 201020031202093. The next prime is 201020031202157. The reversal of 201020031202123 is 321202130020102.

It is not a de Polignac number, because 201020031202123 - 2¹⁷ = 201020031071051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 201020031202123.

It is not an unprimeable number, because it can be changed into a prime (201020031202183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10265017590 + ... + 10265037172.

It is an arithmetic number, because the mean of its divisors is an integer number (3874323087360).

Almost surely, 2^{201020031202123} is an apocalyptic number.

201020031202123 is a deficient number, since it is larger than the sum of its proper divisors (46936646388917).

201020031202123 is a wasteful number, since it uses less digits than its factorization.

201020031202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23216.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201020031202123 its reverse (321202130020102), we get a palindrome (522222161222225).

The spelling of 201020031202123 in words is "two hundred one trillion, twenty billion, thirty-one million, two hundred two thousand, one hundred twenty-three".