212102121010123 has 2 divisors, whose sum is σ = 212102121010124. Its totient is φ = 212102121010122.

The previous prime is 212102121010121. The next prime is 212102121010139. The reversal of 212102121010123 is 321010121201212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212102121010123 - 2¹ = 212102121010121 is a prime.

Together with 212102121010121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212102121010123.

It is not a weakly prime, because it can be changed into another prime (212102121010121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051060505061 + 106051060505062.

It is an arithmetic number, because the mean of its divisors is an integer number (106051060505062).

Almost surely, 2^{212102121010123} is an apocalyptic number.

212102121010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102121010123 is an equidigital number, since it uses as much as digits as its factorization.

212102121010123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 212102121010123 its reverse (321010121201212), we get a palindrome (533112242211335).

The spelling of 212102121010123 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-one million, ten thousand, one hundred twenty-three".