213110921849890 has 8 divisors (see below), whose sum is σ = 383599659329820. Its totient is φ = 85244368739952.

The previous prime is 213110921849869. The next prime is 213110921849897. The reversal of 213110921849890 is 98948129011312.

It can be written as a sum of positive squares in 2 ways, for example, as 207849398822289 + 5261523027601 = 14416983^2 + 2293801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213110921849897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10655546092485 + ... + 10655546092504.

Almost surely, 2^{213110921849890} is an apocalyptic number.

213110921849890 is a deficient number, since it is larger than the sum of its proper divisors (170488737479930).

213110921849890 is a wasteful number, since it uses less digits than its factorization.

213110921849890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21311092184996.

The product of its (nonzero) digits is 2239488, while the sum is 58.

The spelling of 213110921849890 in words is "two hundred thirteen trillion, one hundred ten billion, nine hundred twenty-one million, eight hundred forty-nine thousand, eight hundred ninety".