20111012222011 has 4 divisors (see below), whose sum is σ = 20440700947024. Its totient is φ = 19781323497000.

The previous prime is 20111012222009. The next prime is 20111012222017. The reversal of 20111012222011 is 11022221011102.

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 20111012222011 - 2¹ = 20111012222009 is a prime.

It is a super-3 number, since 3×20111012222011³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111012222017) 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, 164844362415 + ... + 164844362536.

It is an arithmetic number, because the mean of its divisors is an integer number (5110175236756).

Almost surely, 2^{20111012222011} is an apocalyptic number.

20111012222011 is a deficient number, since it is larger than the sum of its proper divisors (329688725013).

20111012222011 is an equidigital number, since it uses as much as digits as its factorization.

20111012222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329688725012.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111012222011 its reverse (11022221011102), we get a palindrome (31133233233113).

The spelling of 20111012222011 in words is "twenty trillion, one hundred eleven billion, twelve million, two hundred twenty-two thousand, eleven".