20101020010111 has 8 divisors (see below), whose sum is σ = 20260377401040. Its totient is φ = 19941873272832.

The previous prime is 20101020010109. The next prime is 20101020010151. The reversal of 20101020010111 is 11101002010102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101020010111 - 2¹ = 20101020010109 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 (20101020010151) 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, 52471810 + ... + 52853503.

It is an arithmetic number, because the mean of its divisors is an integer number (2532547175130).

Almost surely, 2^{20101020010111} is an apocalyptic number.

20101020010111 is a deficient number, since it is larger than the sum of its proper divisors (159357390929).

20101020010111 is a wasteful number, since it uses less digits than its factorization.

20101020010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105326825.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20101020010111 its reverse (11101002010102), we get a palindrome (31202022020213).

Subtracting from 20101020010111 its reverse (11101002010102), we obtain a square (9000018000009 = 3000003²).

The spelling of 20101020010111 in words is "twenty trillion, one hundred one billion, twenty million, ten thousand, one hundred eleven".