1021112321 has 2 divisors, whose sum is σ = 1021112322. Its totient is φ = 1021112320.

The previous prime is 1021112303. The next prime is 1021112329. The reversal of 1021112321 is 1232111201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988222096 + 32890225 = 31436^2 + 5735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021112321 - 2¹⁴ = 1021095937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021112296 and 1021112305.

It is not a weakly prime, because it can be changed into another prime (1021112329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510556160 + 510556161.

It is an arithmetic number, because the mean of its divisors is an integer number (510556161).

Almost surely, 2^1021112321 is an apocalyptic number.

It is an amenable number.

1021112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021112321 is an equidigital number, since it uses as much as digits as its factorization.

1021112321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1021112321 is about 31954.8481611163. The cubic root of 1021112321 is about 1006.9884876042.

Adding to 1021112321 its reverse (1232111201), we get a palindrome (2253223522).

The spelling of 1021112321 in words is "one billion, twenty-one million, one hundred twelve thousand, three hundred twenty-one".