2021222112523 has 2 divisors, whose sum is σ = 2021222112524. Its totient is φ = 2021222112522.

The previous prime is 2021222112521. The next prime is 2021222112529. The reversal of 2021222112523 is 3252112221202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021222112523 - 2¹ = 2021222112521 is a prime.

Together with 2021222112521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2021222112521) 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, 1010611056261 + 1010611056262.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611056262).

Almost surely, 2^{2021222112523} is an apocalyptic number.

2021222112523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021222112523 is an equidigital number, since it uses as much as digits as its factorization.

2021222112523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2021222112523 its reverse (3252112221202), we get a palindrome (5273334333725).

The spelling of 2021222112523 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, five hundred twenty-three".