20111210112211 has 4 divisors (see below), whose sum is σ = 20206523904424. Its totient is φ = 20015896320000.

The previous prime is 20111210112199. The next prime is 20111210112221. The reversal of 20111210112211 is 11221101211102.

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 20111210112211 - 2¹¹ = 20111210110163 is a prime.

It is a super-2 number, since 2×20111210112211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111210112221) 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, 47656895790 + ... + 47656896211.

It is an arithmetic number, because the mean of its divisors is an integer number (5051630976106).

Almost surely, 2^{20111210112211} is an apocalyptic number.

20111210112211 is a deficient number, since it is larger than the sum of its proper divisors (95313792213).

20111210112211 is an equidigital number, since it uses as much as digits as its factorization.

20111210112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95313792212.

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

Adding to 20111210112211 its reverse (11221101211102), we get a palindrome (31332311323313).

The spelling of 20111210112211 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred twelve thousand, two hundred eleven".