20111012211 has 16 divisors (see below), whose sum is σ = 26897705600. Its totient is φ = 13365874368.

The previous prime is 20111012197. The next prime is 20111012221. The reversal of 20111012211 is 11221011102.

It is not a de Polignac number, because 20111012211 - 2⁷ = 20111012083 is a prime.

It is a super-2 number, since 2×20111012211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111012221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286420 + ... + 2295198.

It is an arithmetic number, because the mean of its divisors is an integer number (1681106600).

Almost surely, 2^20111012211 is an apocalyptic number.

20111012211 is a deficient number, since it is larger than the sum of its proper divisors (6786693389).

20111012211 is a wasteful number, since it uses less digits than its factorization.

20111012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11058.

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

Adding to 20111012211 its reverse (11221011102), we get a palindrome (31332023313).

The spelling of 20111012211 in words is "twenty billion, one hundred eleven million, twelve thousand, two hundred eleven".