1002221213909 has 2 divisors, whose sum is σ = 1002221213910. Its totient is φ = 1002221213908.

The previous prime is 1002221213899. The next prime is 1002221213921. The reversal of 1002221213909 is 9093121222001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759076562500 + 243144651409 = 871250^2 + 493097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002221213909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002221213989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501110606954 + 501110606955.

It is an arithmetic number, because the mean of its divisors is an integer number (501110606955).

Almost surely, 2^{1002221213909} is an apocalyptic number.

It is an amenable number.

1002221213909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002221213909 is an equidigital number, since it uses as much as digits as its factorization.

1002221213909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

It can be divided in two parts, 100222 and 1213909, that added together give a palindrome (1314131).

The spelling of 1002221213909 in words is "one trillion, two billion, two hundred twenty-one million, two hundred thirteen thousand, nine hundred nine".