2012020123 has 2 divisors, whose sum is σ = 2012020124. Its totient is φ = 2012020122.

The previous prime is 2012020093. The next prime is 2012020211. The reversal of 2012020123 is 3210202102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012020123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2012020723) 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, 1006010061 + 1006010062.

It is an arithmetic number, because the mean of its divisors is an integer number (1006010062).

Almost surely, 2^2012020123 is an apocalyptic number.

2012020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012020123 is an equidigital number, since it uses as much as digits as its factorization.

2012020123 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 13.

The square root of 2012020123 is about 44855.5472935065. The cubic root of 2012020123 is about 1262.4400777755.

Adding to 2012020123 its reverse (3210202102), we get a palindrome (5222222225).

The spelling of 2012020123 in words is "two billion, twelve million, twenty thousand, one hundred twenty-three".