20101000111011 has 8 divisors (see below), whose sum is σ = 29779259423760. Its totient is φ = 13400666740656.

The previous prime is 20101000111001. The next prime is 20101000111019. The reversal of 20101000111011 is 11011100010102.

It is not a de Polignac number, because 20101000111011 - 2¹³ = 20101000102819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20101000110984 and 20101000111002.

It is not an unprimeable number, because it can be changed into a prime (20101000111019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372240742770 + ... + 372240742823.

It is an arithmetic number, because the mean of its divisors is an integer number (3722407427970).

Almost surely, 2^{20101000111011} is an apocalyptic number.

20101000111011 is a deficient number, since it is larger than the sum of its proper divisors (9678259312749).

20101000111011 is an equidigital number, since it uses as much as digits as its factorization.

20101000111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744481485602 (or 744481485596 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20101000111011 its reverse (11011100010102), we get a palindrome (31112100121113).

The spelling of 20101000111011 in words is "twenty trillion, one hundred one billion, one hundred eleven thousand, eleven".