10019921012 has 12 divisors (see below), whose sum is σ = 18008777220. Its totient is φ = 4874556096.

The previous prime is 10019920987. The next prime is 10019921033. The reversal of 10019921012 is 21012991001.

It can be written as a sum of positive squares in 2 ways, for example, as 9508980196 + 510940816 = 97514^2 + 22604^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 33850937 + ... + 33851232.

It is an arithmetic number, because the mean of its divisors is an integer number (1500731435).

Almost surely, 2^10019921012 is an apocalyptic number.

It is an amenable number.

10019921012 is a deficient number, since it is larger than the sum of its proper divisors (7988856208).

10019921012 is a wasteful number, since it uses less digits than its factorization.

10019921012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67702210 (or 67702208 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 10019921012 in words is "ten billion, nineteen million, nine hundred twenty-one thousand, twelve".