223021200121 has 2 divisors, whose sum is σ = 223021200122. Its totient is φ = 223021200120.

The previous prime is 223021200097. The next prime is 223021200133. The reversal of 223021200121 is 121002120322.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209649515625 + 13371684496 = 457875^2 + 115636^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021200121 - 2¹⁵ = 223021167353 is a prime.

It is a super-2 number, since 2×223021200121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223021200095 and 223021200104.

It is not a weakly prime, because it can be changed into another prime (223021200151) 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, 111510600060 + 111510600061.

It is an arithmetic number, because the mean of its divisors is an integer number (111510600061).

Almost surely, 2^223021200121 is an apocalyptic number.

It is an amenable number.

223021200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

223021200121 is an equidigital number, since it uses as much as digits as its factorization.

223021200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 223021200121 its reverse (121002120322), we get a palindrome (344023320443).

The spelling of 223021200121 in words is "two hundred twenty-three billion, twenty-one million, two hundred thousand, one hundred twenty-one".