213420323209997 has 2 divisors, whose sum is σ = 213420323209998. Its totient is φ = 213420323209996.

The previous prime is 213420323209927. The next prime is 213420323210009. The reversal of 213420323209997 is 799902323024312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212971672415401 + 448650794596 = 14593549^2 + 669814^2 .

It is a cyclic number.

It is not a de Polignac number, because 213420323209997 - 2¹⁰ = 213420323208973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213420323209927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710161604998 + 106710161604999.

It is an arithmetic number, because the mean of its divisors is an integer number (106710161604999).

Almost surely, 2^{213420323209997} is an apocalyptic number.

It is an amenable number.

213420323209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420323209997 is an equidigital number, since it uses as much as digits as its factorization.

213420323209997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 213420323209997 in words is "two hundred thirteen trillion, four hundred twenty billion, three hundred twenty-three million, two hundred nine thousand, nine hundred ninety-seven".