20200102111111 has 4 divisors (see below), whose sum is σ = 21753956119672. Its totient is φ = 18646248102552.

The previous prime is 20200102111109. The next prime is 20200102111219. The reversal of 20200102111111 is 11111120100202.

It is a happy number.

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 20200102111111 - 2¹ = 20200102111109 is a prime.

It is a super-2 number, since 2×20200102111111² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1553854008547 = 20200102111111 / (2 + 0 + 2 + 0 + 0 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200102111091 and 20200102111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200102111711) 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, 776927004261 + ... + 776927004286.

It is an arithmetic number, because the mean of its divisors is an integer number (5438489029918).

Almost surely, 2^{20200102111111} is an apocalyptic number.

20200102111111 is a deficient number, since it is larger than the sum of its proper divisors (1553854008561).

20200102111111 is a wasteful number, since it uses less digits than its factorization.

20200102111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553854008560.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20200102111111 its reverse (11111120100202), we get a palindrome (31311222211313).

The spelling of 20200102111111 in words is "twenty trillion, two hundred billion, one hundred two million, one hundred eleven thousand, one hundred eleven".