2111001989 has 8 divisors (see below), whose sum is σ = 2130421920. Its totient is φ = 2091632400.

The previous prime is 2111001961. The next prime is 2111002007. The reversal of 2111001989 is 9891001112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111001989 - 2¹⁶ = 2110936453 is a prime.

It is a super-2 number, since 2×2111001989² = 8912658795123912242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111001889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74402 + ... + 98780.

It is an arithmetic number, because the mean of its divisors is an integer number (266302740).

Almost surely, 2^2111001989 is an apocalyptic number.

It is an amenable number.

2111001989 is a deficient number, since it is larger than the sum of its proper divisors (19419931).

2111001989 is a wasteful number, since it uses less digits than its factorization.

2111001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25171.

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

The square root of 2111001989 is about 45945.6416757890. The cubic root of 2111001989 is about 1282.8116070675.

The spelling of 2111001989 in words is "two billion, one hundred eleven million, one thousand, nine hundred eighty-nine".