20110202111 has 4 divisors (see below), whose sum is σ = 20174452272. Its totient is φ = 20045951952.

The previous prime is 20110202081. The next prime is 20110202113. The reversal of 20110202111 is 11120201102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11120201102 = 2 ⋅5560100551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110202111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110202092 and 20110202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110202113) 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, 32124611 + ... + 32125236.

It is an arithmetic number, because the mean of its divisors is an integer number (5043613068).

Almost surely, 2^20110202111 is an apocalyptic number.

20110202111 is a deficient number, since it is larger than the sum of its proper divisors (64250161).

20110202111 is an equidigital number, since it uses as much as digits as its factorization.

20110202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64250160.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110202111 its reverse (11120201102), we get a palindrome (31230403213).

The spelling of 20110202111 in words is "twenty billion, one hundred ten million, two hundred two thousand, one hundred eleven".