2021122121011 has 16 divisors (see below), whose sum is σ = 2321846265024. Its totient is φ = 1723409409024.

The previous prime is 2021122120961. The next prime is 2021122121017. The reversal of 2021122121011 is 1101212211202.

It is a cyclic number.

It is not a de Polignac number, because 2021122121011 - 2³¹ = 2018974637363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021122121017) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1267131 + ... + 2376523.

It is an arithmetic number, because the mean of its divisors is an integer number (145115391564).

Almost surely, 2^{2021122121011} is an apocalyptic number.

2021122121011 is a deficient number, since it is larger than the sum of its proper divisors (300724144013).

2021122121011 is a wasteful number, since it uses less digits than its factorization.

2021122121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021122121011 its reverse (1101212211202), we get a palindrome (3122334332213).

The spelling of 2021122121011 in words is "two trillion, twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".