1223021023 has 4 divisors (see below), whose sum is σ = 1397738320. Its totient is φ = 1048303728.

The previous prime is 1223021003. The next prime is 1223021029. The reversal of 1223021023 is 3201203221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201203221 = 139 ⋅23030239.

It is a cyclic number.

It is not a de Polignac number, because 1223021023 - 2¹³ = 1223012831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223020988 and 1223021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223021029) 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, 87358638 + ... + 87358651.

It is an arithmetic number, because the mean of its divisors is an integer number (349434580).

Almost surely, 2^1223021023 is an apocalyptic number.

1223021023 is a deficient number, since it is larger than the sum of its proper divisors (174717297).

1223021023 is an equidigital number, since it uses as much as digits as its factorization.

1223021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174717296.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1223021023 is about 34971.7174728380. The cubic root of 1223021023 is about 1069.4109848110.

Adding to 1223021023 its reverse (3201203221), we get a palindrome (4424224244).

The spelling of 1223021023 in words is "one billion, two hundred twenty-three million, twenty-one thousand, twenty-three".