2101213345 has 48 divisors (see below), whose sum is σ = 3388065408. Its totient is φ = 1232770560.

The previous prime is 2101213333. The next prime is 2101213403. The reversal of 2101213345 is 5433121012.

It is a happy number.

It is not a de Polignac number, because 2101213345 - 2¹⁵ = 2101180577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22884 + ... + 68746.

It is an arithmetic number, because the mean of its divisors is an integer number (70584696).

Almost surely, 2^2101213345 is an apocalyptic number.

It is an amenable number.

2101213345 is a deficient number, since it is larger than the sum of its proper divisors (1286852063).

2101213345 is a wasteful number, since it uses less digits than its factorization.

2101213345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45910 (or 45903 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2101213345 is about 45838.9937171400. The cubic root of 2101213345 is about 1280.8257499355.

Adding to 2101213345 its reverse (5433121012), we get a palindrome (7534334357).

The spelling of 2101213345 in words is "two billion, one hundred one million, two hundred thirteen thousand, three hundred forty-five".