1012210321 has 2 divisors, whose sum is σ = 1012210322. Its totient is φ = 1012210320.

The previous prime is 1012210319. The next prime is 1012210333. The reversal of 1012210321 is 1230122101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999508225 + 12702096 = 31615^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012210321 - 2¹ = 1012210319 is a prime.

Together with 1012210319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1012210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506105160 + 506105161.

It is an arithmetic number, because the mean of its divisors is an integer number (506105161).

Almost surely, 2^1012210321 is an apocalyptic number.

It is an amenable number.

1012210321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012210321 is an equidigital number, since it uses as much as digits as its factorization.

1012210321 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 13.

The square root of 1012210321 is about 31815.2529614335. The cubic root of 1012210321 is about 1004.0536526965.

Adding to 1012210321 its reverse (1230122101), we get a palindrome (2242332422).

The spelling of 1012210321 in words is "one billion, twelve million, two hundred ten thousand, three hundred twenty-one".