2021121120011 has 16 divisors (see below), whose sum is σ = 2311125400320. Its totient is φ = 1731435320160.

The previous prime is 2021121120001. The next prime is 2021121120037. The reversal of 2021121120011 is 1100211211202.

It is not a de Polignac number, because 2021121120011 - 2¹⁰ = 2021121118987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021121120001) 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, 115702100 + ... + 115719566.

It is an arithmetic number, because the mean of its divisors is an integer number (144445337520).

Almost surely, 2^{2021121120011} is an apocalyptic number.

2021121120011 is a deficient number, since it is larger than the sum of its proper divisors (290004280309).

2021121120011 is a wasteful number, since it uses less digits than its factorization.

2021121120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25634.

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

Adding to 2021121120011 its reverse (1100211211202), we get a palindrome (3121332331213).

The spelling of 2021121120011 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, eleven".