21201012000067 has 2 divisors, whose sum is σ = 21201012000068. Its totient is φ = 21201012000066.

The previous prime is 21201012000013. The next prime is 21201012000107. The reversal of 21201012000067 is 76000021010212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201012000067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201012000667) 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, 10600506000033 + 10600506000034.

It is an arithmetic number, because the mean of its divisors is an integer number (10600506000034).

Almost surely, 2^{21201012000067} is an apocalyptic number.

21201012000067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201012000067 is an equidigital number, since it uses as much as digits as its factorization.

21201012000067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 21201012000067 its reverse (76000021010212), we get a palindrome (97201033010279).

The spelling of 21201012000067 in words is "twenty-one trillion, two hundred one billion, twelve million, sixty-seven", and thus it is an aban number.