1212211000901 has 2 divisors, whose sum is σ = 1212211000902. Its totient is φ = 1212211000900.

The previous prime is 1212211000823. The next prime is 1212211001033. The reversal of 1212211000901 is 1090001122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166402160001 + 45808840900 = 1080001^2 + 214030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211000901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212211000201) 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, 606105500450 + 606105500451.

It is an arithmetic number, because the mean of its divisors is an integer number (606105500451).

Almost surely, 2^{1212211000901} is an apocalyptic number.

It is an amenable number.

1212211000901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211000901 is an equidigital number, since it uses as much as digits as its factorization.

1212211000901 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 1212211000901 in words is "one trillion, two hundred twelve billion, two hundred eleven million, nine hundred one", and thus it is an aban number.