20000131002123 has 4 divisors (see below), whose sum is σ = 26666841336168. Its totient is φ = 13333420668080.

The previous prime is 20000131002119. The next prime is 20000131002161. The reversal of 20000131002123 is 32120013100002.

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 20000131002123 - 2² = 20000131002119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20000131003123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333355167018 + ... + 3333355167023.

It is an arithmetic number, because the mean of its divisors is an integer number (6666710334042).

Almost surely, 2^{20000131002123} is an apocalyptic number.

20000131002123 is a deficient number, since it is larger than the sum of its proper divisors (6666710334045).

20000131002123 is an equidigital number, since it uses as much as digits as its factorization.

20000131002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666710334044.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20000131002123 its reverse (32120013100002), we get a palindrome (52120144102125).

The spelling of 20000131002123 in words is "twenty trillion, one hundred thirty-one million, two thousand, one hundred twenty-three".