211211023 has 2 divisors, whose sum is σ = 211211024. Its totient is φ = 211211022.

The previous prime is 211211017. The next prime is 211211041. The reversal of 211211023 is 320112112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211211023 is a prime.

It is a super-2 number, since 2×211211023² = 89220192473413058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211210994 and 211211012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211211053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605511 + 105605512.

It is an arithmetic number, because the mean of its divisors is an integer number (105605512).

Almost surely, 2^211211023 is an apocalyptic number.

211211023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211023 is an equidigital number, since it uses as much as digits as its factorization.

211211023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 211211023 is about 14533.1009423316. The cubic root of 211211023 is about 595.5325815465.

Adding to 211211023 its reverse (320112112), we get a palindrome (531323135).

The spelling of 211211023 in words is "two hundred eleven million, two hundred eleven thousand, twenty-three".