1223422621 has 4 divisors (see below), whose sum is σ = 1230182044. Its totient is φ = 1216663200.

The previous prime is 1223422619. The next prime is 1223422639. The reversal of 1223422621 is 1262243221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 309267396 + 914155225 = 17586^2 + 30235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223422621 - 2¹ = 1223422619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223422661) 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, 3379440 + ... + 3379801.

It is an arithmetic number, because the mean of its divisors is an integer number (307545511).

Almost surely, 2^1223422621 is an apocalyptic number.

It is an amenable number.

1223422621 is a deficient number, since it is larger than the sum of its proper divisors (6759423).

1223422621 is an equidigital number, since it uses as much as digits as its factorization.

1223422621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759422.

The product of its digits is 2304, while the sum is 25.

The square root of 1223422621 is about 34977.4587556043. The cubic root of 1223422621 is about 1069.5280245853.

Adding to 1223422621 its reverse (1262243221), we get a palindrome (2485665842).

The spelling of 1223422621 in words is "one billion, two hundred twenty-three million, four hundred twenty-two thousand, six hundred twenty-one".