23220223111021 has 4 divisors (see below), whose sum is σ = 23227625161692. Its totient is φ = 23212821060352.

The previous prime is 23220223111013. The next prime is 23220223111031. The reversal of 23220223111021 is 12011132202232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21295816038121 + 1924407072900 = 4614739^2 + 1387230^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220223111021 - 2³ = 23220223111013 is a prime.

It is a super-2 number, since 2×23220223111021² (a number of 28 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 = 23220223110983 and 23220223111001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220223111031) 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, 3701020630 + ... + 3701026903.

It is an arithmetic number, because the mean of its divisors is an integer number (5806906290423).

Almost surely, 2^{23220223111021} is an apocalyptic number.

It is an amenable number.

23220223111021 is a deficient number, since it is larger than the sum of its proper divisors (7402050671).

23220223111021 is an equidigital number, since it uses as much as digits as its factorization.

23220223111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402050670.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 23220223111021 its reverse (12011132202232), we get a palindrome (35231355313253).

The spelling of 23220223111021 in words is "twenty-three trillion, two hundred twenty billion, two hundred twenty-three million, one hundred eleven thousand, twenty-one".