213420010997 has 2 divisors, whose sum is σ = 213420010998. Its totient is φ = 213420010996.

The previous prime is 213420010987. The next prime is 213420011017. The reversal of 213420010997 is 799010024312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168784575556 + 44635435441 = 410834^2 + 211271^2 .

It is a cyclic number.

It is not a de Polignac number, because 213420010997 - 2⁶ = 213420010933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213420010997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213420010987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710005498 + 106710005499.

It is an arithmetic number, because the mean of its divisors is an integer number (106710005499).

Almost surely, 2^213420010997 is an apocalyptic number.

It is an amenable number.

213420010997 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420010997 is an equidigital number, since it uses as much as digits as its factorization.

213420010997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 213420010997 in words is "two hundred thirteen billion, four hundred twenty million, ten thousand, nine hundred ninety-seven".