2021231112011 has 2 divisors, whose sum is σ = 2021231112012. Its totient is φ = 2021231112010.

The previous prime is 2021231111969. The next prime is 2021231112091. The reversal of 2021231112011 is 1102111321202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021231112011 is a prime.

It is a super-2 number, since 2×2021231112011² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021231112091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010615556005 + 1010615556006.

It is an arithmetic number, because the mean of its divisors is an integer number (1010615556006).

Almost surely, 2^{2021231112011} is an apocalyptic number.

2021231112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021231112011 is an equidigital number, since it uses as much as digits as its factorization.

2021231112011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2021231112011 its reverse (1102111321202), we get a palindrome (3123342433213).

The spelling of 2021231112011 in words is "two trillion, twenty-one billion, two hundred thirty-one million, one hundred twelve thousand, eleven".