20010200111 has 4 divisors (see below), whose sum is σ = 21829309224. Its totient is φ = 18191091000.

The previous prime is 20010200099. The next prime is 20010200117. The reversal of 20010200111 is 11100201002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010200111 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 (20010200117) 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, 909554540 + ... + 909554561.

It is an arithmetic number, because the mean of its divisors is an integer number (5457327306).

Almost surely, 2^20010200111 is an apocalyptic number.

20010200111 is a deficient number, since it is larger than the sum of its proper divisors (1819109113).

20010200111 is a wasteful number, since it uses less digits than its factorization.

20010200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819109112.

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

Adding to 20010200111 its reverse (11100201002), we get a palindrome (31110401113).

The spelling of 20010200111 in words is "twenty billion, ten million, two hundred thousand, one hundred eleven".