20203121103911 has 2 divisors, whose sum is σ = 20203121103912. Its totient is φ = 20203121103910.

The previous prime is 20203121103899. The next prime is 20203121103917. The reversal of 20203121103911 is 11930112130202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20203121103911 - 2³⁴ = 20185941234727 is a prime.

It is a super-2 number, since 2×20203121103911² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203121103917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101560551955 + 10101560551956.

It is an arithmetic number, because the mean of its divisors is an integer number (10101560551956).

Almost surely, 2^{20203121103911} is an apocalyptic number.

20203121103911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203121103911 is an equidigital number, since it uses as much as digits as its factorization.

20203121103911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20203121103911 in words is "twenty trillion, two hundred three billion, one hundred twenty-one million, one hundred three thousand, nine hundred eleven".