20111122211 has 8 divisors (see below), whose sum is σ = 20273487360. Its totient is φ = 19948819968.

The previous prime is 20111122183. The next prime is 20111122219. The reversal of 20111122211 is 11222111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111122211 - 2¹⁰ = 20111121187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111122219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792305 + ... + 817293.

It is an arithmetic number, because the mean of its divisors is an integer number (2534185920).

Almost surely, 2^20111122211 is an apocalyptic number.

20111122211 is a deficient number, since it is larger than the sum of its proper divisors (162365149).

20111122211 is a wasteful number, since it uses less digits than its factorization.

20111122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31453.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20111122211 its reverse (11222111102), we get a palindrome (31333233313).

It can be divided in two parts, 201111 and 22211, that added together give a palindrome (223322).

The spelling of 20111122211 in words is "twenty billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".