30002120321 has 2 divisors, whose sum is σ = 30002120322. Its totient is φ = 30002120320.

The previous prime is 30002120303. The next prime is 30002120381. The reversal of 30002120321 is 12302120003.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29908243600 + 93876721 = 172940^2 + 9689^2 .

It is a cyclic number.

It is not a de Polignac number, because 30002120321 - 2¹⁸ = 30001858177 is a prime.

It is a super-2 number, since 2×30002120321² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30002120296 and 30002120305.

It is not a weakly prime, because it can be changed into another prime (30002120381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15001060160 + 15001060161.

It is an arithmetic number, because the mean of its divisors is an integer number (15001060161).

Almost surely, 2^30002120321 is an apocalyptic number.

It is an amenable number.

30002120321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30002120321 is an equidigital number, since it uses as much as digits as its factorization.

30002120321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30002120321 its reverse (12302120003), we get a palindrome (42304240324).

The spelling of 30002120321 in words is "thirty billion, two million, one hundred twenty thousand, three hundred twenty-one".