20123010111 has 4 divisors (see below), whose sum is σ = 26830680152. Its totient is φ = 13415340072.

The previous prime is 20123010107. The next prime is 20123010119. The reversal of 20123010111 is 11101032102.

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

It is not a de Polignac number, because 20123010111 - 2² = 20123010107 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 (20123010119) 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, 3353835016 + ... + 3353835021.

It is an arithmetic number, because the mean of its divisors is an integer number (6707670038).

Almost surely, 2^20123010111 is an apocalyptic number.

20123010111 is a deficient number, since it is larger than the sum of its proper divisors (6707670041).

20123010111 is an equidigital number, since it uses as much as digits as its factorization.

20123010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707670040.

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

Adding to 20123010111 its reverse (11101032102), we get a palindrome (31224042213).

The spelling of 20123010111 in words is "twenty billion, one hundred twenty-three million, ten thousand, one hundred eleven".