2121201110051 has 2 divisors, whose sum is σ = 2121201110052. Its totient is φ = 2121201110050.

The previous prime is 2121201109981. The next prime is 2121201110101. The reversal of 2121201110051 is 1500111021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121201110051 - 2¹⁸ = 2121200847907 is a prime.

It is a super-2 number, since 2×2121201110051² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2121201113051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600555025 + 1060600555026.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600555026).

Almost surely, 2^{2121201110051} is an apocalyptic number.

2121201110051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121201110051 is an equidigital number, since it uses as much as digits as its factorization.

2121201110051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 2121201110051 its reverse (1500111021212), we get a palindrome (3621312131263).

The spelling of 2121201110051 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred ten thousand, fifty-one".