211020120112111 has 4 divisors (see below), whose sum is σ = 211020515067672. Its totient is φ = 211019725156552.

The previous prime is 211020120112007. The next prime is 211020120112117. The reversal of 211020120112111 is 111211021020112.

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 211020120112111 - 2²³ = 211020111723503 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 (211020120112117) 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, 196675261 + ... + 197745286.

It is an arithmetic number, because the mean of its divisors is an integer number (52755128766918).

Almost surely, 2^{211020120112111} is an apocalyptic number.

211020120112111 is a deficient number, since it is larger than the sum of its proper divisors (394955561).

211020120112111 is an equidigital number, since it uses as much as digits as its factorization.

211020120112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394955560.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 211020120112111 its reverse (111211021020112), we get a palindrome (322231141132223).

The spelling of 211020120112111 in words is "two hundred eleven trillion, twenty billion, one hundred twenty million, one hundred twelve thousand, one hundred eleven".