2111219993 has 4 divisors (see below), whose sum is σ = 2111623860. Its totient is φ = 2110816128.

The previous prime is 2111219983. The next prime is 2111220029. The reversal of 2111219993 is 3999121112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1678704784 + 432515209 = 40972^2 + 20797^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111219993 - 2²² = 2107025689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111219983) 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, 193988 + ... + 204581.

It is an arithmetic number, because the mean of its divisors is an integer number (527905965).

Almost surely, 2^2111219993 is an apocalyptic number.

It is an amenable number.

2111219993 is a deficient number, since it is larger than the sum of its proper divisors (403867).

2111219993 is an equidigital number, since it uses as much as digits as its factorization.

2111219993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403866.

The product of its digits is 8748, while the sum is 38.

The square root of 2111219993 is about 45948.0140267237. The cubic root of 2111219993 is about 1282.8557643661.

The spelling of 2111219993 in words is "two billion, one hundred eleven million, two hundred nineteen thousand, nine hundred ninety-three".