2121015943 has 2 divisors, whose sum is σ = 2121015944. Its totient is φ = 2121015942.

The previous prime is 2121015901. The next prime is 2121015991. The reversal of 2121015943 is 3495101212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121015943 - 2¹³ = 2121007751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121015643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060507971 + 1060507972.

It is an arithmetic number, because the mean of its divisors is an integer number (1060507972).

Almost surely, 2^2121015943 is an apocalyptic number.

2121015943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121015943 is an equidigital number, since it uses as much as digits as its factorization.

2121015943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 2121015943 is about 46054.4888474511. The cubic root of 2121015943 is about 1284.8368313159.

The spelling of 2121015943 in words is "two billion, one hundred twenty-one million, fifteen thousand, nine hundred forty-three".