1020204521267 has 2 divisors, whose sum is σ = 1020204521268. Its totient is φ = 1020204521266.

The previous prime is 1020204521197. The next prime is 1020204521269. The reversal of 1020204521267 is 7621254020201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020204521267 is a prime.

Together with 1020204521269, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1020204521269) 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, 510102260633 + 510102260634.

It is an arithmetic number, because the mean of its divisors is an integer number (510102260634).

Almost surely, 2^{1020204521267} is an apocalyptic number.

1020204521267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020204521267 is an equidigital number, since it uses as much as digits as its factorization.

1020204521267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 1020204521267 its reverse (7621254020201), we get a palindrome (8641458541468).

The spelling of 1020204521267 in words is "one trillion, twenty billion, two hundred four million, five hundred twenty-one thousand, two hundred sixty-seven".