1012021219618 has 4 divisors (see below), whose sum is σ = 1518031829430. Its totient is φ = 506010609808.

The previous prime is 1012021219603. The next prime is 1012021219619. The reversal of 1012021219618 is 8169121202101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 703137592089 + 308883627529 = 838533^2 + 555773^2 .

It is not an unprimeable number, because it can be changed into a prime (1012021219619) 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, 253005304903 + ... + 253005304906.

Almost surely, 2^{1012021219618} is an apocalyptic number.

1012021219618 is a deficient number, since it is larger than the sum of its proper divisors (506010609812).

1012021219618 is an equidigital number, since it uses as much as digits as its factorization.

1012021219618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506010609811.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 1012021219618 in words is "one trillion, twelve billion, twenty-one million, two hundred nineteen thousand, six hundred eighteen".