21201012000667 has 2 divisors, whose sum is σ = 21201012000668. Its totient is φ = 21201012000666.

The previous prime is 21201012000631. The next prime is 21201012000689. The reversal of 21201012000667 is 76600021010212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201012000667 - 2²⁷ = 21200877782939 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201012000067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600506000333 + 10600506000334.

It is an arithmetic number, because the mean of its divisors is an integer number (10600506000334).

Almost surely, 2^{21201012000667} is an apocalyptic number.

21201012000667 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201012000667 is an equidigital number, since it uses as much as digits as its factorization.

21201012000667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 21201012000667 its reverse (76600021010212), we get a palindrome (97801033010879).

The spelling of 21201012000667 in words is "twenty-one trillion, two hundred one billion, twelve million, six hundred sixty-seven", and thus it is an aban number.