1220202023 has 4 divisors (see below), whose sum is σ = 1224738360. Its totient is φ = 1215665688.

The previous prime is 1220202001. The next prime is 1220202031. The reversal of 1220202023 is 3202020221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3202020221 = 2789 ⋅1148089.

It is a cyclic number.

It is not a de Polignac number, because 1220202023 - 2²² = 1216007719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220201989 and 1220202007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220202073) 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, 2267765 + ... + 2268302.

It is an arithmetic number, because the mean of its divisors is an integer number (306184590).

Almost surely, 2^1220202023 is an apocalyptic number.

1220202023 is a deficient number, since it is larger than the sum of its proper divisors (4536337).

1220202023 is an equidigital number, since it uses as much as digits as its factorization.

1220202023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536336.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1220202023 is about 34931.3902242668. The cubic root of 1220202023 is about 1068.5887071072.

Adding to 1220202023 its reverse (3202020221), we get a palindrome (4422222244).

The spelling of 1220202023 in words is "one billion, two hundred twenty million, two hundred two thousand, twenty-three".