211121211023 has 2 divisors, whose sum is σ = 211121211024. Its totient is φ = 211121211022.

The previous prime is 211121210983. The next prime is 211121211029. The reversal of 211121211023 is 320112121112.

It is a happy number.

211121211023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121211023 - 2¹² = 211121206927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121210992 and 211121211010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121211029) 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 as a sum of consecutive naturals, namely, 105560605511 + 105560605512.

It is an arithmetic number, because the mean of its divisors is an integer number (105560605512).

Almost surely, 2^211121211023 is an apocalyptic number.

211121211023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121211023 is an equidigital number, since it uses as much as digits as its factorization.

211121211023 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 211121211023 its reverse (320112121112), we get a palindrome (531233332135).

The spelling of 211121211023 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, twenty-three".