20121122211 has 8 divisors (see below), whose sum is σ = 26872953600. Its totient is φ = 13391686152.

The previous prime is 20121122209. The next prime is 20121122237. The reversal of 20121122211 is 11222112102.

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

It is not a de Polignac number, because 20121122211 - 2¹ = 20121122209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121122011) 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, 5596735 + ... + 5600328.

It is an arithmetic number, because the mean of its divisors is an integer number (3359119200).

Almost surely, 2^20121122211 is an apocalyptic number.

20121122211 is a deficient number, since it is larger than the sum of its proper divisors (6751831389).

20121122211 is a wasteful number, since it uses less digits than its factorization.

20121122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11197665.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121122211 its reverse (11222112102), we get a palindrome (31343234313).

The spelling of 20121122211 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".