2123221013 has 2 divisors, whose sum is σ = 2123221014. Its totient is φ = 2123221012.

The previous prime is 2123221007. The next prime is 2123221021. The reversal of 2123221013 is 3101223212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1838522884 + 284698129 = 42878^2 + 16873^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123221013 - 2⁴ = 2123220997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123220982 and 2123221000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123221073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061610506 + 1061610507.

It is an arithmetic number, because the mean of its divisors is an integer number (1061610507).

Almost surely, 2^2123221013 is an apocalyptic number.

It is an amenable number.

2123221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123221013 is an equidigital number, since it uses as much as digits as its factorization.

2123221013 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 2123221013 is about 46078.4224230822. The cubic root of 2123221013 is about 1285.2819283801.

Adding to 2123221013 its reverse (3101223212), we get a palindrome (5224444225).

The spelling of 2123221013 in words is "two billion, one hundred twenty-three million, two hundred twenty-one thousand, thirteen".