211321023 has 16 divisors (see below), whose sum is σ = 289833600. Its totient is φ = 136856736.

The previous prime is 211321009. The next prime is 211321031. The reversal of 211321023 is 320123112.

It is not a de Polignac number, because 211321023 - 2⁶ = 211320959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211320993 and 211321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99628 + ... + 101726.

It is an arithmetic number, because the mean of its divisors is an integer number (18114600).

Almost surely, 2^211321023 is an apocalyptic number.

211321023 is a deficient number, since it is larger than the sum of its proper divisors (78512577).

211321023 is a wasteful number, since it uses less digits than its factorization.

211321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211321023 is about 14536.8849139009. The cubic root of 211321023 is about 595.6359492810.

Adding to 211321023 its reverse (320123112), we get a palindrome (531444135).

It can be divided in two parts, 21132 and 1023, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 211321023 in words is "two hundred eleven million, three hundred twenty-one thousand, twenty-three".