20212133121247 has 2 divisors, whose sum is σ = 20212133121248. Its totient is φ = 20212133121246.

The previous prime is 20212133121199. The next prime is 20212133121293. The reversal of 20212133121247 is 74212133121202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20212133121247 - 2¹⁹ = 20212132596959 is a prime.

It is a super-2 number, since 2×20212133121247² (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 (20212133131247) 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, 10106066560623 + 10106066560624.

It is an arithmetic number, because the mean of its divisors is an integer number (10106066560624).

Almost surely, 2^{20212133121247} is an apocalyptic number.

20212133121247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212133121247 is an equidigital number, since it uses as much as digits as its factorization.

20212133121247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 20212133121247 its reverse (74212133121202), we get a palindrome (94424266242449).

The spelling of 20212133121247 in words is "twenty trillion, two hundred twelve billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred forty-seven".