1121212001009 has 2 divisors, whose sum is σ = 1121212001010. Its totient is φ = 1121212001008.

The previous prime is 1121212000927. The next prime is 1121212001029. The reversal of 1121212001009 is 9001002121211.

It is an a-pointer prime, because the next prime (1121212001029) can be obtained adding 1121212001009 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116361296400 + 4850704609 = 1056580^2 + 69647^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121212001009 - 2¹² = 1121211996913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121212001029) 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, 560606000504 + 560606000505.

It is an arithmetic number, because the mean of its divisors is an integer number (560606000505).

Almost surely, 2^{1121212001009} is an apocalyptic number.

It is an amenable number.

1121212001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121212001009 is an equidigital number, since it uses as much as digits as its factorization.

1121212001009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1121212001009 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one thousand, nine".