2141720051 has 2 divisors, whose sum is σ = 2141720052. Its totient is φ = 2141720050.

The previous prime is 2141720047. The next prime is 2141720069. The reversal of 2141720051 is 1500271412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2141720051 - 2² = 2141720047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2141719999 and 2141720026.

It is not a weakly prime, because it can be changed into another prime (2141720351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070860025 + 1070860026.

It is an arithmetic number, because the mean of its divisors is an integer number (1070860026).

Almost surely, 2^2141720051 is an apocalyptic number.

2141720051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141720051 is an equidigital number, since it uses as much as digits as its factorization.

2141720051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2141720051 is about 46278.7213630627. The cubic root of 2141720051 is about 1289.0039084551.

Adding to 2141720051 its reverse (1500271412), we get a palindrome (3641991463).

The spelling of 2141720051 in words is "two billion, one hundred forty-one million, seven hundred twenty thousand, fifty-one".