20111121122 has 8 divisors (see below), whose sum is σ = 30181184172. Its totient is φ = 10050726400.

The previous prime is 20111121103. The next prime is 20111121139. The reversal of 20111121122 is 22112111102.

It can be written as a sum of positive squares in 2 ways, for example, as 17297773441 + 2813347681 = 131521^2 + 53041^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20111121097 and 20111121106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411879 + ... + 2420202.

Almost surely, 2^20111121122 is an apocalyptic number.

20111121122 is a deficient number, since it is larger than the sum of its proper divisors (10070063050).

20111121122 is a wasteful number, since it uses less digits than its factorization.

20111121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834164.

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

Adding to 20111121122 its reverse (22112111102), we get a palindrome (42223232224).

The spelling of 20111121122 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twenty-two".