20001202011111 has 32 divisors (see below), whose sum is σ = 26786628626688. Its totient is φ = 13275075261440.

The previous prime is 20001202011101. The next prime is 20001202011149. The reversal of 20001202011111 is 11111020210002.

It is a cyclic number.

It is not a de Polignac number, because 20001202011111 - 2⁵ = 20001202011079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001202011101) 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 in 31 ways as a sum of consecutive naturals, for example, 3271909591 + ... + 3271915703.

It is an arithmetic number, because the mean of its divisors is an integer number (837082144584).

Almost surely, 2^{20001202011111} is an apocalyptic number.

20001202011111 is a deficient number, since it is larger than the sum of its proper divisors (6785426615577).

20001202011111 is a wasteful number, since it uses less digits than its factorization.

20001202011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001202011111 its reverse (11111020210002), we get a palindrome (31112222221113).

The spelling of 20001202011111 in words is "twenty trillion, one billion, two hundred two million, eleven thousand, one hundred eleven".