108821213 has 2 divisors, whose sum is σ = 108821214. Its totient is φ = 108821212.

The previous prime is 108821197. The next prime is 108821231. The reversal of 108821213 is 312128801.

Together with next prime (108821231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75030244 + 33790969 = 8662^2 + 5813^2 .

It is a cyclic number.

It is not a de Polignac number, because 108821213 - 2⁴ = 108821197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108821263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54410606 + 54410607.

It is an arithmetic number, because the mean of its divisors is an integer number (54410607).

Almost surely, 2^108821213 is an apocalyptic number.

It is an amenable number.

108821213 is a deficient number, since it is larger than the sum of its proper divisors (1).

108821213 is an equidigital number, since it uses as much as digits as its factorization.

108821213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 108821213 is about 10431.7406505338. The cubic root of 108821213 is about 477.4243009299.

The spelling of 108821213 in words is "one hundred eight million, eight hundred twenty-one thousand, two hundred thirteen".