20203023121111 has 2 divisors, whose sum is σ = 20203023121112. Its totient is φ = 20203023121110.

The previous prime is 20203023121067. The next prime is 20203023121117. The reversal of 20203023121111 is 11112132030202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20203023121111 - 2¹⁵ = 20203023088343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203023121117) 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, 10101511560555 + 10101511560556.

It is an arithmetic number, because the mean of its divisors is an integer number (10101511560556).

Almost surely, 2^{20203023121111} is an apocalyptic number.

20203023121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203023121111 is an equidigital number, since it uses as much as digits as its factorization.

20203023121111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20203023121111 its reverse (11112132030202), we get a palindrome (31315155151313).

The spelling of 20203023121111 in words is "twenty trillion, two hundred three billion, twenty-three million, one hundred twenty-one thousand, one hundred eleven".