20111203211131 has 16 divisors (see below), whose sum is σ = 20819641752000. Its totient is φ = 19414231372800.

The previous prime is 20111203211093. The next prime is 20111203211159. The reversal of 20111203211131 is 13111230211102.

It is a cyclic number.

It is not a de Polignac number, because 20111203211131 - 2²¹ = 20111201113979 is a prime.

It is a super-2 number, since 2×20111203211131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111203211099 and 20111203211108.

It is not an unprimeable number, because it can be changed into a prime (20111203218131) 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 15 ways as a sum of consecutive naturals, for example, 5332366 + ... + 8285923.

It is an arithmetic number, because the mean of its divisors is an integer number (1301227609500).

Almost surely, 2^{20111203211131} is an apocalyptic number.

20111203211131 is a deficient number, since it is larger than the sum of its proper divisors (708438540869).

20111203211131 is a wasteful number, since it uses less digits than its factorization.

20111203211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13618710.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20111203211131 its reverse (13111230211102), we get a palindrome (33222433422233).

The spelling of 20111203211131 in words is "twenty trillion, one hundred eleven billion, two hundred three million, two hundred eleven thousand, one hundred thirty-one".