123212221321 has 12 divisors (see below), whose sum is σ = 143456196432. Its totient is φ = 105516385128.

The previous prime is 123212221313. The next prime is 123212221337. The reversal of 123212221321 is 123122212321.

It is not a de Polignac number, because 123212221321 - 2³ = 123212221313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123212221292 and 123212221301.

It is not an unprimeable number, because it can be changed into a prime (123212221621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064535 + ... + 1174588.

It is an arithmetic number, because the mean of its divisors is an integer number (11954683036).

Almost surely, 2^123212221321 is an apocalyptic number.

It is an amenable number.

123212221321 is a deficient number, since it is larger than the sum of its proper divisors (20243975111).

123212221321 is a wasteful number, since it uses less digits than its factorization.

123212221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240260 (or 2240253 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 123212221321 its reverse (123122212321), we get a palindrome (246334433642).

The spelling of 123212221321 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".