20100011111 has 8 divisors (see below), whose sum is σ = 20312005824. Its totient is φ = 19888271200.

The previous prime is 20100011089. The next prime is 20100011131. The reversal of 20100011111 is 11111000102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100011111 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 (20100011131) 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, 97025 + ... + 222741.

It is an arithmetic number, because the mean of its divisors is an integer number (2539000728).

Almost surely, 2^20100011111 is an apocalyptic number.

20100011111 is a deficient number, since it is larger than the sum of its proper divisors (211994713).

20100011111 is a wasteful number, since it uses less digits than its factorization.

20100011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127401.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20100011111 its reverse (11111000102), we get a palindrome (31211011213).

The spelling of 20100011111 in words is "twenty billion, one hundred million, eleven thousand, one hundred eleven".