223021020322121 has 12 divisors (see below), whose sum is σ = 259437799832580. Its totient is φ = 191157054510240.

The previous prime is 223021020322091. The next prime is 223021020322127. The reversal of 223021020322121 is 121223020120322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167216967937600 + 55804052384521 = 12931240^2 + 7470211^2 .

It is not a de Polignac number, because 223021020322121 - 2¹⁸ = 223021020059977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223021020322127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42998390 + ... + 47905151.

It is an arithmetic number, because the mean of its divisors is an integer number (21619816652715).

Almost surely, 2^{223021020322121} is an apocalyptic number.

It is an amenable number.

223021020322121 is a deficient number, since it is larger than the sum of its proper divisors (36416779510459).

223021020322121 is an equidigital number, since it uses as much as digits as its factorization.

223021020322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90953624 (or 90953617 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 223021020322121 its reverse (121223020120322), we get a palindrome (344244040442443).

The spelling of 223021020322121 in words is "two hundred twenty-three trillion, twenty-one billion, twenty million, three hundred twenty-two thousand, one hundred twenty-one".