20210101003123 has 2 divisors, whose sum is σ = 20210101003124. Its totient is φ = 20210101003122.

The previous prime is 20210101003121. The next prime is 20210101003171. The reversal of 20210101003123 is 32130010101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210101003123 - 2¹ = 20210101003121 is a prime.

Together with 20210101003121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20210101003097 and 20210101003106.

It is not a weakly prime, because it can be changed into another prime (20210101003121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105050501561 + 10105050501562.

It is an arithmetic number, because the mean of its divisors is an integer number (10105050501562).

Almost surely, 2^{20210101003123} is an apocalyptic number.

20210101003123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210101003123 is an equidigital number, since it uses as much as digits as its factorization.

20210101003123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20210101003123 its reverse (32130010101202), we get a palindrome (52340111104325).

The spelling of 20210101003123 in words is "twenty trillion, two hundred ten billion, one hundred one million, three thousand, one hundred twenty-three".