20101011111101 has 4 divisors (see below), whose sum is σ = 20106347194272. Its totient is φ = 20095675027932.

The previous prime is 20101011111007. The next prime is 20101011111119. The reversal of 20101011111101 is 10111111010102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20101011111101 - 2⁴² = 15702964599997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101011111001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2668035935 + ... + 2668043468.

It is an arithmetic number, because the mean of its divisors is an integer number (5026586798568).

Almost surely, 2^{20101011111101} is an apocalyptic number.

It is an amenable number.

20101011111101 is a deficient number, since it is larger than the sum of its proper divisors (5336083171).

20101011111101 is an equidigital number, since it uses as much as digits as its factorization.

20101011111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336083170.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 20101011111101 its reverse (10111111010102), we get a palindrome (30212122121203).

The spelling of 20101011111101 in words is "twenty trillion, one hundred one billion, eleven million, one hundred eleven thousand, one hundred one".