1012212112321 has 2 divisors, whose sum is σ = 1012212112322. Its totient is φ = 1012212112320.

The previous prime is 1012212112277. The next prime is 1012212112339. The reversal of 1012212112321 is 1232112122101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872757666225 + 139454446096 = 934215^2 + 373436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012212112321 - 2⁹ = 1012212111809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012212112361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506106056160 + 506106056161.

It is an arithmetic number, because the mean of its divisors is an integer number (506106056161).

Almost surely, 2^{1012212112321} is an apocalyptic number.

It is an amenable number.

1012212112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012212112321 is an equidigital number, since it uses as much as digits as its factorization.

1012212112321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1012212112321 its reverse (1232112122101), we get a palindrome (2244324234422).

The spelling of 1012212112321 in words is "one trillion, twelve billion, two hundred twelve million, one hundred twelve thousand, three hundred twenty-one".