303421099999981 has 2 divisors, whose sum is σ = 303421099999982. Its totient is φ = 303421099999980.

The previous prime is 303421099999933. The next prime is 303421100000003. The reversal of 303421099999981 is 189999990124303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280783811126025 + 22637288873956 = 16756605^2 + 4757866^2 .

It is a cyclic number.

It is not a de Polignac number, because 303421099999981 - 2¹¹ = 303421099997933 is a prime.

It is a super-2 number, since 2×303421099999981² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 303421099999898 and 303421099999907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (303421099499981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151710549999990 + 151710549999991.

It is an arithmetic number, because the mean of its divisors is an integer number (151710549999991).

Almost surely, 2^{303421099999981} is an apocalyptic number.

It is an amenable number.

303421099999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

303421099999981 is an equidigital number, since it uses as much as digits as its factorization.

303421099999981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306110016, while the sum is 76.

The spelling of 303421099999981 in words is "three hundred three trillion, four hundred twenty-one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-one".