2121442051 has 2 divisors, whose sum is σ = 2121442052. Its totient is φ = 2121442050.

The previous prime is 2121442033. The next prime is 2121442061. The reversal of 2121442051 is 1502441212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121442051 - 2⁷ = 2121441923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121442021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060721025 + 1060721026.

It is an arithmetic number, because the mean of its divisors is an integer number (1060721026).

Almost surely, 2^2121442051 is an apocalyptic number.

2121442051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121442051 is an equidigital number, since it uses as much as digits as its factorization.

2121442051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2121442051 is about 46059.1147439896. The cubic root of 2121442051 is about 1284.9228659661.

Adding to 2121442051 its reverse (1502441212), we get a palindrome (3623883263).

The spelling of 2121442051 in words is "two billion, one hundred twenty-one million, four hundred forty-two thousand, fifty-one".