20010121212223 has 2 divisors, whose sum is σ = 20010121212224. Its totient is φ = 20010121212222.

The previous prime is 20010121212187. The next prime is 20010121212241. The reversal of 20010121212223 is 32221212101002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010121212223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20010121212223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010121212623) 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, 10005060606111 + 10005060606112.

It is an arithmetic number, because the mean of its divisors is an integer number (10005060606112).

Almost surely, 2^{20010121212223} is an apocalyptic number.

20010121212223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010121212223 is an equidigital number, since it uses as much as digits as its factorization.

20010121212223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20010121212223 its reverse (32221212101002), we get a palindrome (52231333313225).

The spelling of 20010121212223 in words is "twenty trillion, ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-three".