2191307126401 has 8 divisors (see below), whose sum is σ = 2288170391040. Its totient is φ = 2094576281952.

The previous prime is 2191307126317. The next prime is 2191307126419. The reversal of 2191307126401 is 1046217031912.

It is a happy number.

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 2191307126401 - 2³¹ = 2189159642753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191307126441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33071220 + ... + 33137413.

It is an arithmetic number, because the mean of its divisors is an integer number (286021298880).

Almost surely, 2^{2191307126401} is an apocalyptic number.

It is an amenable number.

2191307126401 is a deficient number, since it is larger than the sum of its proper divisors (96863264639).

2191307126401 is a wasteful number, since it uses less digits than its factorization.

2191307126401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66210095.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 2191307126401 in words is "two trillion, one hundred ninety-one billion, three hundred seven million, one hundred twenty-six thousand, four hundred one".