20123111201 has 4 divisors (see below), whose sum is σ = 20129126832. Its totient is φ = 20117095572.

The previous prime is 20123111137. The next prime is 20123111213. The reversal of 20123111201 is 10211132102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20123111201 - 2⁶ = 20123111137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123191201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002795 + ... + 3009488.

It is an arithmetic number, because the mean of its divisors is an integer number (5032281708).

Almost surely, 2^20123111201 is an apocalyptic number.

It is an amenable number.

20123111201 is a deficient number, since it is larger than the sum of its proper divisors (6015631).

20123111201 is an equidigital number, since it uses as much as digits as its factorization.

20123111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015630.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20123111201 its reverse (10211132102), we get a palindrome (30334243303).

The spelling of 20123111201 in words is "twenty billion, one hundred twenty-three million, one hundred eleven thousand, two hundred one".