20203002011111 has 16 divisors (see below), whose sum is σ = 20700500865024. Its totient is φ = 19712373637824.

The previous prime is 20203002011039. The next prime is 20203002011191. The reversal of 20203002011111 is 11111020030202.

It is a cyclic number.

It is not a de Polignac number, because 20203002011111 - 2³⁰ = 20201928269287 is a prime.

It is a super-2 number, since 2×20203002011111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203002011191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77036 + ... + 6357038.

It is an arithmetic number, because the mean of its divisors is an integer number (1293781304064).

Almost surely, 2^{20203002011111} is an apocalyptic number.

20203002011111 is a deficient number, since it is larger than the sum of its proper divisors (497498853913).

20203002011111 is a wasteful number, since it uses less digits than its factorization.

20203002011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280550.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20203002011111 its reverse (11111020030202), we get a palindrome (31314022041313).

The spelling of 20203002011111 in words is "twenty trillion, two hundred three billion, two million, eleven thousand, one hundred eleven".