1909111020133 has 2 divisors, whose sum is σ = 1909111020134. Its totient is φ = 1909111020132.

The previous prime is 1909111020101. The next prime is 1909111020139. The reversal of 1909111020133 is 3310201119091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1474820794084 + 434290226049 = 1214422^2 + 659007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1909111020133 - 2⁵ = 1909111020101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1909111020095 and 1909111020104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1909111020139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954555510066 + 954555510067.

It is an arithmetic number, because the mean of its divisors is an integer number (954555510067).

Almost surely, 2^{1909111020133} is an apocalyptic number.

It is an amenable number.

1909111020133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909111020133 is an equidigital number, since it uses as much as digits as its factorization.

1909111020133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 1909111020133 in words is "one trillion, nine hundred nine billion, one hundred eleven million, twenty thousand, one hundred thirty-three".