210021011001988 has 12 divisors (see below), whose sum is σ = 389156579209692. Its totient is φ = 98833416942080.

The previous prime is 210021011001859. The next prime is 210021011002003. The reversal of 210021011001988 is 889100110120012.

It can be written as a sum of positive squares in 2 ways, for example, as 116723995916544 + 93297015085444 = 10803888^2 + 9659038^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544272139653 + ... + 1544272139788.

It is an arithmetic number, because the mean of its divisors is an integer number (32429714934141).

Almost surely, 2^{210021011001988} is an apocalyptic number.

It is an amenable number.

210021011001988 is a deficient number, since it is larger than the sum of its proper divisors (179135568207704).

210021011001988 is a wasteful number, since it uses less digits than its factorization.

210021011001988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088544279462 (or 3088544279460 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 210021011001988 in words is "two hundred ten trillion, twenty-one billion, eleven million, one thousand, nine hundred eighty-eight".