1909111020112 has 20 divisors (see below), whose sum is σ = 3701380144500. Its totient is φ = 953916144128.

The previous prime is 1909111020101. The next prime is 1909111020133. The reversal of 1909111020112 is 2110201119091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1422638249536 + 486472770576 = 1192744^2 + 697476^2 .

It is a super-2 number, since 2×1909111020112² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 39935737 + ... + 39983512.

It is an arithmetic number, because the mean of its divisors is an integer number (185069007225).

Almost surely, 2^{1909111020112} is an apocalyptic number.

It is an amenable number.

1909111020112 is a deficient number, since it is larger than the sum of its proper divisors (1792269124388).

1909111020112 is a wasteful number, since it uses less digits than its factorization.

1909111020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79920750 (or 79920744 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 1909111020112 in words is "one trillion, nine hundred nine billion, one hundred eleven million, twenty thousand, one hundred twelve".