2102993021 has 2 divisors, whose sum is σ = 2102993022. Its totient is φ = 2102993020.

The previous prime is 2102992987. The next prime is 2102993059. The reversal of 2102993021 is 1203992012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1526464900 + 576528121 = 39070^2 + 24011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102993021 - 2¹⁰ = 2102991997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102993071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051496510 + 1051496511.

It is an arithmetic number, because the mean of its divisors is an integer number (1051496511).

Almost surely, 2^2102993021 is an apocalyptic number.

It is an amenable number.

2102993021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102993021 is an equidigital number, since it uses as much as digits as its factorization.

2102993021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2102993021 is about 45858.4018583291. The cubic root of 2102993021 is about 1281.1872571901.

The spelling of 2102993021 in words is "two billion, one hundred two million, nine hundred ninety-three thousand, twenty-one".