213201420997 has 2 divisors, whose sum is σ = 213201420998. Its totient is φ = 213201420996.

The previous prime is 213201420947. The next prime is 213201421021. The reversal of 213201420997 is 799024102312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168751710436 + 44449710561 = 410794^2 + 210831^2 .

It is a cyclic number.

It is not a de Polignac number, because 213201420997 - 2⁷ = 213201420869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213201420917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106600710498 + 106600710499.

It is an arithmetic number, because the mean of its divisors is an integer number (106600710499).

Almost surely, 2^213201420997 is an apocalyptic number.

It is an amenable number.

213201420997 is a deficient number, since it is larger than the sum of its proper divisors (1).

213201420997 is an equidigital number, since it uses as much as digits as its factorization.

213201420997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 213201420997 in words is "two hundred thirteen billion, two hundred one million, four hundred twenty thousand, nine hundred ninety-seven".