21201220750067 has 2 divisors, whose sum is σ = 21201220750068. Its totient is φ = 21201220750066.

The previous prime is 21201220750027. The next prime is 21201220750079. The reversal of 21201220750067 is 76005702210212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201220750067 - 2²⁰ = 21201219701491 is a prime.

It is a super-2 number, since 2×21201220750067² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201220750027) 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, 10600610375033 + 10600610375034.

It is an arithmetic number, because the mean of its divisors is an integer number (10600610375034).

Almost surely, 2^{21201220750067} is an apocalyptic number.

21201220750067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201220750067 is an equidigital number, since it uses as much as digits as its factorization.

21201220750067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

Adding to 21201220750067 its reverse (76005702210212), we get a palindrome (97206922960279).

The spelling of 21201220750067 in words is "twenty-one trillion, two hundred one billion, two hundred twenty million, seven hundred fifty thousand, sixty-seven".