221110001023 has 4 divisors (see below), whose sum is σ = 224410150360. Its totient is φ = 217809851688.

The previous prime is 221110001009. The next prime is 221110001041. The reversal of 221110001023 is 320100011122.

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

It is a cyclic number.

It is not a de Polignac number, because 221110001023 - 2⁹ = 221110000511 is a prime.

It is a super-2 number, since 2×221110001023² (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 = 221110000994 and 221110001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110001003) 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, 1650074568 + ... + 1650074701.

It is an arithmetic number, because the mean of its divisors is an integer number (56102537590).

Almost surely, 2^221110001023 is an apocalyptic number.

221110001023 is a deficient number, since it is larger than the sum of its proper divisors (3300149337).

221110001023 is an equidigital number, since it uses as much as digits as its factorization.

221110001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300149336.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 221110001023 its reverse (320100011122), we get a palindrome (541210012145).

The spelling of 221110001023 in words is "two hundred twenty-one billion, one hundred ten million, one thousand, twenty-three".