2121201000047 has 2 divisors, whose sum is σ = 2121201000048. Its totient is φ = 2121201000046.

The previous prime is 2121201000019. The next prime is 2121201000071. The reversal of 2121201000047 is 7400001021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121201000047 - 2¹⁶ = 2121200934511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121200999992 and 2121201000028.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121201000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600500023 + 1060600500024.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600500024).

Almost surely, 2^{2121201000047} is an apocalyptic number.

2121201000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121201000047 is an equidigital number, since it uses as much as digits as its factorization.

2121201000047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 2121201000047 its reverse (7400001021212), we get a palindrome (9521202021259).

The spelling of 2121201000047 in words is "two trillion, one hundred twenty-one billion, two hundred one million, forty-seven", and thus it is an aban number.