2121100003 has 16 divisors (see below), whose sum is σ = 2353135104. Its totient is φ = 1895715360.

The previous prime is 2121099983. The next prime is 2121100019. The reversal of 2121100003 is 3000011212.

It is not a de Polignac number, because 2121100003 - 2¹⁷ = 2120968931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121100103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407926 + ... + 413092.

It is an arithmetic number, because the mean of its divisors is an integer number (147070944).

Almost surely, 2^2121100003 is an apocalyptic number.

2121100003 is a deficient number, since it is larger than the sum of its proper divisors (232035101).

2121100003 is a wasteful number, since it uses less digits than its factorization.

2121100003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5802.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2121100003 is about 46055.4014530326. The cubic root of 2121100003 is about 1284.8538046218.

Adding to 2121100003 its reverse (3000011212), we get a palindrome (5121111215).

The spelling of 2121100003 in words is "two billion, one hundred twenty-one million, one hundred thousand, three".