1321222123 has 8 divisors (see below), whose sum is σ = 1453128768. Its totient is φ = 1193640384.

The previous prime is 1321222121. The next prime is 1321222127. The reversal of 1321222123 is 3212221231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321222123 - 2¹ = 1321222121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321222123.

It is not an unprimeable number, because it can be changed into a prime (1321222121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080586 + ... + 1081807.

It is an arithmetic number, because the mean of its divisors is an integer number (181641096).

Almost surely, 2^1321222123 is an apocalyptic number.

1321222123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321222123 is a deficient number, since it is larger than the sum of its proper divisors (131906645).

1321222123 is a wasteful number, since it uses less digits than its factorization.

1321222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162453.

The product of its digits is 288, while the sum is 19.

The square root of 1321222123 is about 36348.6192722640. The cubic root of 1321222123 is about 1097.2997468809.

Adding to 1321222123 its reverse (3212221231), we get a palindrome (4533443354).

The spelling of 1321222123 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-three".