20202111131 has 4 divisors (see below), whose sum is σ = 20347450200. Its totient is φ = 20056772064.

The previous prime is 20202111079. The next prime is 20202111151. The reversal of 20202111131 is 13111120202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202111131 is a prime.

It is a super-2 number, since 2×20202111131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202111151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72669326 + ... + 72669603.

It is an arithmetic number, because the mean of its divisors is an integer number (5086862550).

Almost surely, 2^20202111131 is an apocalyptic number.

20202111131 is a deficient number, since it is larger than the sum of its proper divisors (145339069).

20202111131 is a wasteful number, since it uses less digits than its factorization.

20202111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145339068.

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

Adding to 20202111131 its reverse (13111120202), we get a palindrome (33313231333).

The spelling of 20202111131 in words is "twenty billion, two hundred two million, one hundred eleven thousand, one hundred thirty-one".