21121134302239 has 2 divisors, whose sum is σ = 21121134302240. Its totient is φ = 21121134302238.

The previous prime is 21121134302221. The next prime is 21121134302269. The reversal of 21121134302239 is 93220343112112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121134302239 - 2¹¹ = 21121134300191 is a prime.

It is a super-2 number, since 2×21121134302239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121134302269) 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, 10560567151119 + 10560567151120.

It is an arithmetic number, because the mean of its divisors is an integer number (10560567151120).

Almost surely, 2^{21121134302239} is an apocalyptic number.

21121134302239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121134302239 is an equidigital number, since it uses as much as digits as its factorization.

21121134302239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21121134302239 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirty-four million, three hundred two thousand, two hundred thirty-nine".