1221322023 has 16 divisors (see below), whose sum is σ = 1810099200. Its totient is φ = 813884760.

The previous prime is 1221322021. The next prime is 1221322027. The reversal of 1221322023 is 3202231221.

1221322023 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1221322023 - 2¹ = 1221322021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221321987 and 1221322005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221322021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71658 + ... + 87048.

It is an arithmetic number, because the mean of its divisors is an integer number (113131200).

Almost surely, 2^1221322023 is an apocalyptic number.

1221322023 is a deficient number, since it is larger than the sum of its proper divisors (588777177).

1221322023 is a wasteful number, since it uses less digits than its factorization.

1221322023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18339 (or 18333 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221322023 is about 34947.4179732924. The cubic root of 1221322023 is about 1068.9155528089.

Adding to 1221322023 its reverse (3202231221), we get a palindrome (4423553244).

The spelling of 1221322023 in words is "one billion, two hundred twenty-one million, three hundred twenty-two thousand, twenty-three".