2138127099 has 4 divisors (see below), whose sum is σ = 2850836136. Its totient is φ = 1425418064.

The previous prime is 2138127097. The next prime is 2138127119. The reversal of 2138127099 is 9907218312.

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

It is a cyclic number.

It is not a de Polignac number, because 2138127099 - 2¹ = 2138127097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2138127099.

It is not an unprimeable number, because it can be changed into a prime (2138127097) 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, 356354514 + ... + 356354519.

It is an arithmetic number, because the mean of its divisors is an integer number (712709034).

Almost surely, 2^2138127099 is an apocalyptic number.

2138127099 is a deficient number, since it is larger than the sum of its proper divisors (712709037).

2138127099 is an equidigital number, since it uses as much as digits as its factorization.

2138127099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712709036.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 2138127099 is about 46239.8864509851. The cubic root of 2138127099 is about 1288.2826935254.

The spelling of 2138127099 in words is "two billion, one hundred thirty-eight million, one hundred twenty-seven thousand, ninety-nine".