20100002111 has 4 divisors (see below), whose sum is σ = 22971430992. Its totient is φ = 17228573232.

The previous prime is 20100002099. The next prime is 20100002113. The reversal of 20100002111 is 11120000102.

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 20100002111 - 2¹⁰ = 20100001087 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 (20100002113) 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, 1435714430 + ... + 1435714443.

It is an arithmetic number, because the mean of its divisors is an integer number (5742857748).

Almost surely, 2^20100002111 is an apocalyptic number.

20100002111 is a deficient number, since it is larger than the sum of its proper divisors (2871428881).

20100002111 is an equidigital number, since it uses as much as digits as its factorization.

20100002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871428880.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20100002111 its reverse (11120000102), we get a palindrome (31220002213).

The spelling of 20100002111 in words is "twenty billion, one hundred million, two thousand, one hundred eleven".