20111020200111 has 8 divisors (see below), whose sum is σ = 26814717749680. Its totient is φ = 13407334725312.

The previous prime is 20111020200101. The next prime is 20111020200157. The reversal of 20111020200111 is 11100202011102.

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

It is not a de Polignac number, because 20111020200111 - 2¹³ = 20111020191919 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 (20111020200101) 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, 2114595 + ... + 6685323.

It is an arithmetic number, because the mean of its divisors is an integer number (3351839718710).

Almost surely, 2^{20111020200111} is an apocalyptic number.

20111020200111 is a deficient number, since it is larger than the sum of its proper divisors (6703697549569).

20111020200111 is a wasteful number, since it uses less digits than its factorization.

20111020200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037385.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111020200111 its reverse (11100202011102), we get a palindrome (31211222211213).

The spelling of 20111020200111 in words is "twenty trillion, one hundred eleven billion, twenty million, two hundred thousand, one hundred eleven".