20212120011 has 16 divisors (see below), whose sum is σ = 27357311744. Its totient is φ = 13270919904.

The previous prime is 20212119887. The next prime is 20212120031. The reversal of 20212120011 is 11002121202.

It is not a de Polignac number, because 20212120011 - 2¹⁰ = 20212118987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212120031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1612410 + ... + 1624896.

It is an arithmetic number, because the mean of its divisors is an integer number (1709831984).

Almost surely, 2^20212120011 is an apocalyptic number.

20212120011 is a deficient number, since it is larger than the sum of its proper divisors (7145191733).

20212120011 is a wasteful number, since it uses less digits than its factorization.

20212120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20610.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20212120011 its reverse (11002121202), we get a palindrome (31214241213).

The spelling of 20212120011 in words is "twenty billion, two hundred twelve million, one hundred twenty thousand, eleven".