1291047695112 has 128 divisors (see below), whose sum is σ = 3776594595840. Its totient is φ = 360121267200.

The previous prime is 1291047695107. The next prime is 1291047695137. The reversal of 1291047695112 is 2115967401921.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2962423 + ... + 3370169.

It is an arithmetic number, because the mean of its divisors is an integer number (29504645280).

Almost surely, 2^{1291047695112} is an apocalyptic number.

1291047695112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291047695112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888297297920).

1291047695112 is an abundant number, since it is smaller than the sum of its proper divisors (2485546900728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1291047695112 is a wasteful number, since it uses less digits than its factorization.

1291047695112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408211 (or 408207 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 1291047695112 in words is "one trillion, two hundred ninety-one billion, forty-seven million, six hundred ninety-five thousand, one hundred twelve".