1021012199999 has 8 divisors (see below), whose sum is σ = 1126346452560. Its totient is φ = 917763774400.

The previous prime is 1021012199957. The next prime is 1021012200031. The reversal of 1021012199999 is 9999912101201.

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

It is a de Polignac number, because none of the positive numbers 2^k-1021012199999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021012199999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021012199099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521455712 + ... + 521457669.

It is an arithmetic number, because the mean of its divisors is an integer number (140793306570).

Almost surely, 2^{1021012199999} is an apocalyptic number.

1021012199999 is a deficient number, since it is larger than the sum of its proper divisors (105334252561).

1021012199999 is a wasteful number, since it uses less digits than its factorization.

1021012199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042913481.

The product of its (nonzero) digits is 236196, while the sum is 53.

The spelling of 1021012199999 in words is "one trillion, twenty-one billion, twelve million, one hundred ninety-nine thousand, nine hundred ninety-nine".