342303020021 has 2 divisors, whose sum is σ = 342303020022. Its totient is φ = 342303020020.

The previous prime is 342303020009. The next prime is 342303020083. The reversal of 342303020021 is 120020303243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312018319396 + 30284700625 = 558586^2 + 174025^2 .

It is an emirp because it is prime and its reverse (120020303243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342303020021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 342303019975 and 342303020002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342303020321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171151510010 + 171151510011.

It is an arithmetic number, because the mean of its divisors is an integer number (171151510011).

Almost surely, 2^342303020021 is an apocalyptic number.

It is an amenable number.

342303020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

342303020021 is an equidigital number, since it uses as much as digits as its factorization.

342303020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 342303020021 its reverse (120020303243), we get a palindrome (462323323264).

The spelling of 342303020021 in words is "three hundred forty-two billion, three hundred three million, twenty thousand, twenty-one".