2113220321 has 2 divisors, whose sum is σ = 2113220322. Its totient is φ = 2113220320.

The previous prime is 2113220303. The next prime is 2113220359. The reversal of 2113220321 is 1230223112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2064430096 + 48790225 = 45436^2 + 6985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113220321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113220321.

It is not a weakly prime, because it can be changed into another prime (2113220521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056610160 + 1056610161.

It is an arithmetic number, because the mean of its divisors is an integer number (1056610161).

Almost surely, 2^2113220321 is an apocalyptic number.

It is an amenable number.

2113220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113220321 is an equidigital number, since it uses as much as digits as its factorization.

2113220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2113220321 is about 45969.7761686959. The cubic root of 2113220321 is about 1283.2607943632.

Adding to 2113220321 its reverse (1230223112), we get a palindrome (3343443433).

The spelling of 2113220321 in words is "two billion, one hundred thirteen million, two hundred twenty thousand, three hundred twenty-one".