1999101811 has 8 divisors (see below), whose sum is σ = 2286951264. Its totient is φ = 1711818240.

The previous prime is 1999101803. The next prime is 1999101827. The reversal of 1999101811 is 1181019991.

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 1999101811 - 2³ = 1999101803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999101851) 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, 133870 + ... + 148051.

It is an arithmetic number, because the mean of its divisors is an integer number (285868908).

Almost surely, 2^1999101811 is an apocalyptic number.

1999101811 is a deficient number, since it is larger than the sum of its proper divisors (287849453).

1999101811 is a wasteful number, since it uses less digits than its factorization.

1999101811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282941.

The product of its (nonzero) digits is 5832, while the sum is 40.

The square root of 1999101811 is about 44711.3163639811. The cubic root of 1999101811 is about 1259.7324137823.

The spelling of 1999101811 in words is "one billion, nine hundred ninety-nine million, one hundred one thousand, eight hundred eleven".