20101131120011 has 4 divisors (see below), whose sum is σ = 20101141648224. Its totient is φ = 20101120591800.

The previous prime is 20101131119963. The next prime is 20101131120043. The reversal of 20101131120011 is 11002113110102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101131120011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101131120911) 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, 1505795 + ... + 6516876.

It is an arithmetic number, because the mean of its divisors is an integer number (5025285412056).

Almost surely, 2^{20101131120011} is an apocalyptic number.

20101131120011 is a deficient number, since it is larger than the sum of its proper divisors (10528213).

20101131120011 is an equidigital number, since it uses as much as digits as its factorization.

20101131120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528212.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20101131120011 its reverse (11002113110102), we get a palindrome (31103244230113).

The spelling of 20101131120011 in words is "twenty trillion, one hundred one billion, one hundred thirty-one million, one hundred twenty thousand, eleven".