10212121982 has 4 divisors (see below), whose sum is σ = 15318182976. Its totient is φ = 5106060990.

The previous prime is 10212121981. The next prime is 10212121999. The reversal of 10212121982 is 28912121201.

10212121982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28912121201 = 31 ⋅932649071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553030494 + ... + 2553030497.

It is an arithmetic number, because the mean of its divisors is an integer number (3829545744).

Almost surely, 2^10212121982 is an apocalyptic number.

10212121982 is a deficient number, since it is larger than the sum of its proper divisors (5106060994).

10212121982 is an equidigital number, since it uses as much as digits as its factorization.

10212121982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106060993.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 10212121982 in words is "ten billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-two".