21312021302027 has 2 divisors, whose sum is σ = 21312021302028. Its totient is φ = 21312021302026.

The previous prime is 21312021301979. The next prime is 21312021302063. The reversal of 21312021302027 is 72020312021312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312021302027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21312021301987 and 21312021302005.

It is not a weakly prime, because it can be changed into another prime (21312021382027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656010651013 + 10656010651014.

It is an arithmetic number, because the mean of its divisors is an integer number (10656010651014).

Almost surely, 2^{21312021302027} is an apocalyptic number.

21312021302027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312021302027 is an equidigital number, since it uses as much as digits as its factorization.

21312021302027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 21312021302027 its reverse (72020312021312), we get a palindrome (93332333323339).

The spelling of 21312021302027 in words is "twenty-one trillion, three hundred twelve billion, twenty-one million, three hundred two thousand, twenty-seven".