30310323221 has 2 divisors, whose sum is σ = 30310323222. Its totient is φ = 30310323220.

The previous prime is 30310323209. The next prime is 30310323229. The reversal of 30310323221 is 12232301303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26752200721 + 3558122500 = 163561^2 + 59650^2 .

It is a cyclic number.

It is not a de Polignac number, because 30310323221 - 2¹⁰ = 30310322197 is a prime.

It is a super-2 number, since 2×30310323221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30310323193 and 30310323202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30310323229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155161610 + 15155161611.

It is an arithmetic number, because the mean of its divisors is an integer number (15155161611).

Almost surely, 2^30310323221 is an apocalyptic number.

It is an amenable number.

30310323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30310323221 is an equidigital number, since it uses as much as digits as its factorization.

30310323221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30310323221 its reverse (12232301303), we get a palindrome (42542624524).

The spelling of 30310323221 in words is "thirty billion, three hundred ten million, three hundred twenty-three thousand, two hundred twenty-one".