20020231202123 has 4 divisors (see below), whose sum is σ = 20508529524168. Its totient is φ = 19531932880080.

The previous prime is 20020231202093. The next prime is 20020231202131. The reversal of 20020231202123 is 32120213202002.

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 20020231202123 - 2¹⁸ = 20020230939979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020231202095 and 20020231202104.

It is not an unprimeable number, because it can be changed into a prime (20020231252123) 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, 244149160961 + ... + 244149161042.

It is an arithmetic number, because the mean of its divisors is an integer number (5127132381042).

Almost surely, 2^{20020231202123} is an apocalyptic number.

20020231202123 is a deficient number, since it is larger than the sum of its proper divisors (488298322045).

20020231202123 is an equidigital number, since it uses as much as digits as its factorization.

20020231202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488298322044.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20020231202123 its reverse (32120213202002), we get a palindrome (52140444404125).

The spelling of 20020231202123 in words is "twenty trillion, twenty billion, two hundred thirty-one million, two hundred two thousand, one hundred twenty-three".