223121011 has 2 divisors, whose sum is σ = 223121012. Its totient is φ = 223121010.

The previous prime is 223120991. The next prime is 223121027. The reversal of 223121011 is 110121322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223121011 - 2¹¹ = 223118963 is a prime.

It is a super-3 number, since 3×223121011³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223120982 and 223121000.

It is not a weakly prime, because it can be changed into another prime (223121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560505 + 111560506.

It is an arithmetic number, because the mean of its divisors is an integer number (111560506).

Almost surely, 2^223121011 is an apocalyptic number.

223121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

223121011 is an equidigital number, since it uses as much as digits as its factorization.

223121011 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 223121011 is about 14937.2357215115. The cubic root of 223121011 is about 606.5223696114.

Adding to 223121011 its reverse (110121322), we get a palindrome (333242333).

The spelling of 223121011 in words is "two hundred twenty-three million, one hundred twenty-one thousand, eleven".