223021102021 has 4 divisors (see below), whose sum is σ = 223022060044. Its totient is φ = 223020144000.

The previous prime is 223021101991. The next prime is 223021102033. The reversal of 223021102021 is 120201120322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 96010121025 + 127010980996 = 309855^2 + 356386^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021102021 - 2¹⁹ = 223020577733 is a prime.

It is a super-2 number, since 2×223021102021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223021101986 and 223021102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021102081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119221 + ... + 678421.

It is an arithmetic number, because the mean of its divisors is an integer number (55755515011).

Almost surely, 2^223021102021 is an apocalyptic number.

It is an amenable number.

223021102021 is a deficient number, since it is larger than the sum of its proper divisors (958023).

223021102021 is an equidigital number, since it uses as much as digits as its factorization.

223021102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958022.

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

Adding to 223021102021 its reverse (120201120322), we get a palindrome (343222222343).

The spelling of 223021102021 in words is "two hundred twenty-three billion, twenty-one million, one hundred two thousand, twenty-one".