1020111001913 has 2 divisors, whose sum is σ = 1020111001914. Its totient is φ = 1020111001912.

The previous prime is 1020111001883. The next prime is 1020111001933. The reversal of 1020111001913 is 3191001110201.

It is a happy number.

It is an a-pointer prime, because the next prime (1020111001933) can be obtained adding 1020111001913 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., 839700987904 + 180410014009 = 916352^2 + 424747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020111001913 - 2²⁰ = 1020109953337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020111001933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510055500956 + 510055500957.

It is an arithmetic number, because the mean of its divisors is an integer number (510055500957).

Almost surely, 2^{1020111001913} is an apocalyptic number.

It is an amenable number.

1020111001913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020111001913 is an equidigital number, since it uses as much as digits as its factorization.

1020111001913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 1020111001913 in words is "one trillion, twenty billion, one hundred eleven million, one thousand, nine hundred thirteen".