2142416621 has 2 divisors, whose sum is σ = 2142416622. Its totient is φ = 2142416620.

The previous prime is 2142416609. The next prime is 2142416641. The reversal of 2142416621 is 1266142412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2098922596 + 43494025 = 45814^2 + 6595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142416621 - 2¹⁴ = 2142400237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142416641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071208310 + 1071208311.

It is an arithmetic number, because the mean of its divisors is an integer number (1071208311).

Almost surely, 2^2142416621 is an apocalyptic number.

It is an amenable number.

2142416621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142416621 is an equidigital number, since it uses as much as digits as its factorization.

2142416621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 2142416621 is about 46286.2465641793. The cubic root of 2142416621 is about 1289.1436379104.

The spelling of 2142416621 in words is "two billion, one hundred forty-two million, four hundred sixteen thousand, six hundred twenty-one".