1212012223321 has 8 divisors (see below), whose sum is σ = 1235027337480. Its totient is φ = 1189002552192.

The previous prime is 1212012223259. The next prime is 1212012223327. The reversal of 1212012223321 is 1233222102121.

It can be written as a sum of positive squares in 4 ways, for example, as 71804705296 + 1140207518025 = 267964^2 + 1067805^2 .

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 1212012223321 - 2¹³ = 1212012215129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212012223292 and 1212012223301.

It is not an unprimeable number, because it can be changed into a prime (1212012223327) 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, 909780 + ... + 1803253.

It is an arithmetic number, because the mean of its divisors is an integer number (154378417185).

Almost surely, 2^{1212012223321} is an apocalyptic number.

It is an amenable number.

1212012223321 is a deficient number, since it is larger than the sum of its proper divisors (23015114159).

1212012223321 is an equidigital number, since it uses as much as digits as its factorization.

1212012223321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721515.

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

Adding to 1212012223321 its reverse (1233222102121), we get a palindrome (2445234325442).

The spelling of 1212012223321 in words is "one trillion, two hundred twelve billion, twelve million, two hundred twenty-three thousand, three hundred twenty-one".