210001101993 has 12 divisors (see below), whose sum is σ = 303344748148. Its totient is φ = 139996200960.

The previous prime is 210001101967. The next prime is 210001102013. The reversal of 210001101993 is 399101100012.

It can be written as a sum of positive squares in 2 ways, for example, as 134657439849 + 75343662144 = 366957^2 + 274488^2 .

It is not a de Polignac number, because 210001101993 - 2¹⁸ = 210000839849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210001101913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71368 + ... + 651993.

Almost surely, 2^210001101993 is an apocalyptic number.

It is an amenable number.

210001101993 is a deficient number, since it is larger than the sum of its proper divisors (93343646155).

210001101993 is a wasteful number, since it uses less digits than its factorization.

210001101993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755624 (or 755621 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The spelling of 210001101993 in words is "two hundred ten billion, one million, one hundred one thousand, nine hundred ninety-three".