2101002020123 has 2 divisors, whose sum is σ = 2101002020124. Its totient is φ = 2101002020122.

The previous prime is 2101002020083. The next prime is 2101002020141. The reversal of 2101002020123 is 3210202001012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101002020123 - 2¹⁰ = 2101002019099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101002020098 and 2101002020107.

It is not a weakly prime, because it can be changed into another prime (2101002022123) 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 as a sum of consecutive naturals, namely, 1050501010061 + 1050501010062.

It is an arithmetic number, because the mean of its divisors is an integer number (1050501010062).

Almost surely, 2^{2101002020123} is an apocalyptic number.

2101002020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101002020123 is an equidigital number, since it uses as much as digits as its factorization.

2101002020123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2101002020123 its reverse (3210202001012), we get a palindrome (5311204021135).

The spelling of 2101002020123 in words is "two trillion, one hundred one billion, two million, twenty thousand, one hundred twenty-three".