20101102211011 has 4 divisors (see below), whose sum is σ = 20247825584952. Its totient is φ = 19954378837072.

The previous prime is 20101102210991. The next prime is 20101102211033. The reversal of 20101102211011 is 11011220110102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20101102211011 - 2¹¹ = 20101102208963 is a prime.

It is a super-2 number, since 2×20101102211011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101102210982 and 20101102211000.

It is not an unprimeable number, because it can be changed into a prime (20101102211051) 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, 73361686765 + ... + 73361687038.

It is an arithmetic number, because the mean of its divisors is an integer number (5061956396238).

Almost surely, 2^{20101102211011} is an apocalyptic number.

20101102211011 is a deficient number, since it is larger than the sum of its proper divisors (146723373941).

20101102211011 is a wasteful number, since it uses less digits than its factorization.

20101102211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146723373940.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20101102211011 its reverse (11011220110102), we get a palindrome (31112322321113).

The spelling of 20101102211011 in words is "twenty trillion, one hundred one billion, one hundred two million, two hundred eleven thousand, eleven".