20121111119 has 2 divisors, whose sum is σ = 20121111120. Its totient is φ = 20121111118.

The previous prime is 20121111071. The next prime is 20121111121. The reversal of 20121111119 is 91111112102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121111119 is a prime.

It is a super-2 number, since 2×20121111119² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 20121111121, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20121111119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121111419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060555559 + 10060555560.

It is an arithmetic number, because the mean of its divisors is an integer number (10060555560).

Almost surely, 2^20121111119 is an apocalyptic number.

20121111119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121111119 is an equidigital number, since it uses as much as digits as its factorization.

20121111119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 20121111119 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred nineteen".