11201020031 has 4 divisors (see below), whose sum is σ = 11201694672. Its totient is φ = 11200345392.

The previous prime is 11201020007. The next prime is 11201020043. The reversal of 11201020031 is 13002010211.

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

It is a cyclic number.

It is not a de Polignac number, because 11201020031 - 2¹⁴ = 11201003647 is a prime.

It is a super-2 number, since 2×11201020031² (a number of 21 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 = 11201019994 and 11201020021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201020081) 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, 311771 + ... + 345836.

It is an arithmetic number, because the mean of its divisors is an integer number (2800423668).

Almost surely, 2^11201020031 is an apocalyptic number.

11201020031 is a deficient number, since it is larger than the sum of its proper divisors (674641).

11201020031 is an equidigital number, since it uses as much as digits as its factorization.

11201020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674640.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11201020031 its reverse (13002010211), we get a palindrome (24203030242).

The spelling of 11201020031 in words is "eleven billion, two hundred one million, twenty thousand, thirty-one".