1021197939218 has 32 divisors (see below), whose sum is σ = 1621337679360. Its totient is φ = 481694290560.

The previous prime is 1021197939193. The next prime is 1021197939227. The reversal of 1021197939218 is 8129397911201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021197939218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674018 + ... + 1580093.

It is an arithmetic number, because the mean of its divisors is an integer number (50666802480).

Almost surely, 2^{1021197939218} is an apocalyptic number.

1021197939218 is a deficient number, since it is larger than the sum of its proper divisors (600139740142).

1021197939218 is a wasteful number, since it uses less digits than its factorization.

1021197939218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254322.

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 1021197939218 in words is "one trillion, twenty-one billion, one hundred ninety-seven million, nine hundred thirty-nine thousand, two hundred eighteen".