1220331023 has 4 divisors (see below), whose sum is σ = 1221111360. Its totient is φ = 1219550688.

The previous prime is 1220331017. The next prime is 1220331029. The reversal of 1220331023 is 3201330221.

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

It is an interprime number because it is at equal distance from previous prime (1220331017) and next prime (1220331029).

It is a cyclic number.

It is not a de Polignac number, because 1220331023 - 2⁸ = 1220330767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220330992 and 1220331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220331029) 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, 387818 + ... + 390951.

It is an arithmetic number, because the mean of its divisors is an integer number (305277840).

Almost surely, 2^1220331023 is an apocalyptic number.

1220331023 is a deficient number, since it is larger than the sum of its proper divisors (780337).

1220331023 is an equidigital number, since it uses as much as digits as its factorization.

1220331023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780336.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1220331023 is about 34933.2366522199. The cubic root of 1220331023 is about 1068.6263629169.

Adding to 1220331023 its reverse (3201330221), we get a palindrome (4421661244).

The spelling of 1220331023 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, twenty-three".