20213120011 has 4 divisors (see below), whose sum is σ = 23100708592. Its totient is φ = 17325531432.

The previous prime is 20213120009. The next prime is 20213120033. The reversal of 20213120011 is 11002131202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11002131202 = 2 ⋅5501065601.

It is a cyclic number.

It is not a de Polignac number, because 20213120011 - 2¹ = 20213120009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213119973 and 20213120000.

It is not an unprimeable number, because it can be changed into a prime (20213129011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443794280 + ... + 1443794293.

It is an arithmetic number, because the mean of its divisors is an integer number (5775177148).

Almost surely, 2^20213120011 is an apocalyptic number.

20213120011 is a deficient number, since it is larger than the sum of its proper divisors (2887588581).

20213120011 is an equidigital number, since it uses as much as digits as its factorization.

20213120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887588580.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20213120011 its reverse (11002131202), we get a palindrome (31215251213).

The spelling of 20213120011 in words is "twenty billion, two hundred thirteen million, one hundred twenty thousand, eleven".