211201020111 has 4 divisors (see below), whose sum is σ = 281601360152. Its totient is φ = 140800680072.

The previous prime is 211201020103. The next prime is 211201020119. The reversal of 211201020111 is 111020102112.

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

It is an interprime number because it is at equal distance from previous prime (211201020103) and next prime (211201020119).

It is not a de Polignac number, because 211201020111 - 2³ = 211201020103 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 (211201020119) 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, 35200170016 + ... + 35200170021.

It is an arithmetic number, because the mean of its divisors is an integer number (70400340038).

Almost surely, 2^211201020111 is an apocalyptic number.

211201020111 is a deficient number, since it is larger than the sum of its proper divisors (70400340041).

211201020111 is an equidigital number, since it uses as much as digits as its factorization.

211201020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70400340040.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211201020111 its reverse (111020102112), we get a palindrome (322221122223).

The spelling of 211201020111 in words is "two hundred eleven billion, two hundred one million, twenty thousand, one hundred eleven".