20211121120011 has 16 divisors (see below), whose sum is σ = 26966286048000. Its totient is φ = 13465019013408.

The previous prime is 20211121119997. The next prime is 20211121120031. The reversal of 20211121120011 is 11002112111202.

It is a happy number.

It is not a de Polignac number, because 20211121120011 - 2⁷ = 20211121119883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211121120031) 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, 248537220 + ... + 248618526.

It is an arithmetic number, because the mean of its divisors is an integer number (1685392878000).

Almost surely, 2^{20211121120011} is an apocalyptic number.

20211121120011 is a deficient number, since it is larger than the sum of its proper divisors (6755164927989).

20211121120011 is a wasteful number, since it uses less digits than its factorization.

20211121120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136018.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20211121120011 its reverse (11002112111202), we get a palindrome (31213233231213).

The spelling of 20211121120011 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, eleven".