2121252047 has 2 divisors, whose sum is σ = 2121252048. Its totient is φ = 2121252046.

The previous prime is 2121252041. The next prime is 2121252083. The reversal of 2121252047 is 7402521212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121252047 - 2⁶ = 2121251983 is a prime.

It is a super-4 number, since 4×2121252047⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121252041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060626023 + 1060626024.

It is an arithmetic number, because the mean of its divisors is an integer number (1060626024).

Almost surely, 2^2121252047 is an apocalyptic number.

2121252047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121252047 is an equidigital number, since it uses as much as digits as its factorization.

2121252047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2121252047 is about 46057.0520876011. The cubic root of 2121252047 is about 1284.8845040457.

Adding to 2121252047 its reverse (7402521212), we get a palindrome (9523773259).

The spelling of 2121252047 in words is "two billion, one hundred twenty-one million, two hundred fifty-two thousand, forty-seven".