1291999011101 has 8 divisors (see below), whose sum is σ = 1302124041504. Its totient is φ = 1281877957360.

The previous prime is 1291999011029. The next prime is 1291999011119. The reversal of 1291999011101 is 1011109991921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1291999011101 - 2³⁴ = 1274819141917 is a prime.

It is a super-2 number, since 2×1291999011101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291999013101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340151 + ... + 1643076.

It is an arithmetic number, because the mean of its divisors is an integer number (162765505188).

Almost surely, 2^{1291999011101} is an apocalyptic number.

It is an amenable number.

1291999011101 is a deficient number, since it is larger than the sum of its proper divisors (10125030403).

1291999011101 is a wasteful number, since it uses less digits than its factorization.

1291999011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988331.

The product of its (nonzero) digits is 13122, while the sum is 44.

The spelling of 1291999011101 in words is "one trillion, two hundred ninety-one billion, nine hundred ninety-nine million, eleven thousand, one hundred one".