2121285307 has 2 divisors, whose sum is σ = 2121285308. Its totient is φ = 2121285306.

The previous prime is 2121285293. The next prime is 2121285349. The reversal of 2121285307 is 7035821212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121285307 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121285367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060642653 + 1060642654.

It is an arithmetic number, because the mean of its divisors is an integer number (1060642654).

Almost surely, 2^2121285307 is an apocalyptic number.

2121285307 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121285307 is an equidigital number, since it uses as much as digits as its factorization.

2121285307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2121285307 is about 46057.4131600983. The cubic root of 2121285307 is about 1284.8912194248.

The spelling of 2121285307 in words is "two billion, one hundred twenty-one million, two hundred eighty-five thousand, three hundred seven".