1220123023 has 4 divisors (see below), whose sum is σ = 1394426320. Its totient is φ = 1045819728.

The previous prime is 1220123011. The next prime is 1220123039. The reversal of 1220123023 is 3203210221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3203210221 = 257 ⋅12463853.

It is a cyclic number.

It is not a de Polignac number, because 1220123023 - 2¹⁷ = 1219991951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220122988 and 1220123006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123083) 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, 87151638 + ... + 87151651.

It is an arithmetic number, because the mean of its divisors is an integer number (348606580).

Almost surely, 2^1220123023 is an apocalyptic number.

1220123023 is a deficient number, since it is larger than the sum of its proper divisors (174303297).

1220123023 is an equidigital number, since it uses as much as digits as its factorization.

1220123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174303296.

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

The square root of 1220123023 is about 34930.2594178744. The cubic root of 1220123023 is about 1068.5656452622.

Adding to 1220123023 its reverse (3203210221), we get a palindrome (4423333244).

The spelling of 1220123023 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, twenty-three".