1021210012169 has 2 divisors, whose sum is σ = 1021210012170. Its totient is φ = 1021210012168.

The previous prime is 1021210012159. The next prime is 1021210012211. The reversal of 1021210012169 is 9612100121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742966422025 + 278243590144 = 861955^2 + 527488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021210012169 is a prime.

It is a super-2 number, since 2×1021210012169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021210012159) 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, 510605006084 + 510605006085.

It is an arithmetic number, because the mean of its divisors is an integer number (510605006085).

Almost surely, 2^{1021210012169} is an apocalyptic number.

It is an amenable number.

1021210012169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021210012169 is an equidigital number, since it uses as much as digits as its factorization.

1021210012169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1021210012169 in words is "one trillion, twenty-one billion, two hundred ten million, twelve thousand, one hundred sixty-nine".