210001011989 has 4 divisors (see below), whose sum is σ = 210069219360. Its totient is φ = 209932804620.

The previous prime is 210001011977. The next prime is 210001011991. The reversal of 210001011989 is 989110100012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210001011989 - 2⁴ = 210001011973 is a prime.

It is a super-2 number, since 2×210001011989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001011919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34099067 + ... + 34105224.

It is an arithmetic number, because the mean of its divisors is an integer number (52517304840).

Almost surely, 2^210001011989 is an apocalyptic number.

It is an amenable number.

210001011989 is a deficient number, since it is larger than the sum of its proper divisors (68207371).

210001011989 is an equidigital number, since it uses as much as digits as its factorization.

210001011989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68207370.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 210001011989 in words is "two hundred ten billion, one million, eleven thousand, nine hundred eighty-nine".