20400311122 has 4 divisors (see below), whose sum is σ = 30600466686. Its totient is φ = 10200155560.

The previous prime is 20400311111. The next prime is 20400311167. The reversal of 20400311122 is 22111300402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22111300402 = 2 ⋅11055650201.

It can be written as a sum of positive squares in only one way, i.e., 20363575401 + 36735721 = 142701^2 + 6061^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20400311096 and 20400311105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100077779 + ... + 5100077782.

Almost surely, 2^20400311122 is an apocalyptic number.

20400311122 is a deficient number, since it is larger than the sum of its proper divisors (10200155564).

20400311122 is a wasteful number, since it uses less digits than its factorization.

20400311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200155563.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20400311122 its reverse (22111300402), we get a palindrome (42511611524).

The spelling of 20400311122 in words is "twenty billion, four hundred million, three hundred eleven thousand, one hundred twenty-two".