20113031102011 has 4 divisors (see below), whose sum is σ = 20113591030792. Its totient is φ = 20112471173232.

The previous prime is 20113031101981. The next prime is 20113031102039. The reversal of 20113031102011 is 11020113031102.

It is a happy number.

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-20113031102011 is a prime.

It is a super-2 number, since 2×20113031102011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113031100011) 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, 279910506 + ... + 279982351.

It is an arithmetic number, because the mean of its divisors is an integer number (5028397757698).

Almost surely, 2^{20113031102011} is an apocalyptic number.

20113031102011 is a deficient number, since it is larger than the sum of its proper divisors (559928781).

20113031102011 is an equidigital number, since it uses as much as digits as its factorization.

20113031102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559928780.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20113031102011 its reverse (11020113031102), we get a palindrome (31133144133113).

The spelling of 20113031102011 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, one hundred two thousand, eleven".