20111013111 has 24 divisors (see below), whose sum is σ = 31721293440. Its totient is φ = 11297222832.

The previous prime is 20111013101. The next prime is 20111013127. The reversal of 20111013111 is 11131011102.

It is not a de Polignac number, because 20111013111 - 2¹⁴ = 20110996727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111013101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1150731 + ... + 1168076.

It is an arithmetic number, because the mean of its divisors is an integer number (1321720560).

Almost surely, 2^20111013111 is an apocalyptic number.

20111013111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20111013111 is a deficient number, since it is larger than the sum of its proper divisors (11610280329).

20111013111 is a wasteful number, since it uses less digits than its factorization.

20111013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318883 (or 2318876 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 20111013111 its reverse (11131011102), we get a palindrome (31242024213).

The spelling of 20111013111 in words is "twenty billion, one hundred eleven million, thirteen thousand, one hundred eleven".