11311031010020 has 48 divisors (see below), whose sum is σ = 28575236242560. Its totient is φ = 3673958943744.

The previous prime is 11311031010017. The next prime is 11311031010023. The reversal of 11311031010020 is 2001013011311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11311031010017) and next prime (11311031010023).

It is a super-2 number, since 2×11311031010020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 11311031009977 and 11311031010004.

It is not an unprimeable number, because it can be changed into a prime (11311031010023) 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, 2126130989 + ... + 2126136308.

It is an arithmetic number, because the mean of its divisors is an integer number (595317421720).

Almost surely, 2^{11311031010020} is an apocalyptic number.

11311031010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311031010020 is an abundant number, since it is smaller than the sum of its proper divisors (17264205232540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11311031010020 is a wasteful number, since it uses less digits than its factorization.

11311031010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252267332 (or 4252267330 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11311031010020 its reverse (2001013011311), we get a palindrome (13312044021331).

The spelling of 11311031010020 in words is "eleven trillion, three hundred eleven billion, thirty-one million, ten thousand, twenty".