213332299981 has 2 divisors, whose sum is σ = 213332299982. Its totient is φ = 213332299980.

The previous prime is 213332299979. The next prime is 213332300009. The reversal of 213332299981 is 189992233312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204475796100 + 8856503881 = 452190^2 + 94109^2 .

It is a cyclic number.

It is not a de Polignac number, because 213332299981 - 2¹ = 213332299979 is a prime.

It is a super-2 number, since 2×213332299981² (a number of 23 digits) contains 22 as substring.

Together with 213332299979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213332299931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106666149990 + 106666149991.

It is an arithmetic number, because the mean of its divisors is an integer number (106666149991).

Almost surely, 2^213332299981 is an apocalyptic number.

It is an amenable number.

213332299981 is a deficient number, since it is larger than the sum of its proper divisors (1).

213332299981 is an equidigital number, since it uses as much as digits as its factorization.

213332299981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 52.

The spelling of 213332299981 in words is "two hundred thirteen billion, three hundred thirty-two million, two hundred ninety-nine thousand, nine hundred eighty-one".