1231385918401 has 8 divisors (see below), whose sum is σ = 1296682499520. Its totient is φ = 1166138016912.

The previous prime is 1231385918359. The next prime is 1231385918429. The reversal of 1231385918401 is 1048195831321.

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 1231385918401 - 2¹⁷ = 1231385787329 is a prime.

It is a super-2 number, since 2×1231385918401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231385918101) 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, 12117970 + ... + 12219163.

It is an arithmetic number, because the mean of its divisors is an integer number (162085312440).

Almost surely, 2^{1231385918401} is an apocalyptic number.

It is an amenable number.

1231385918401 is a deficient number, since it is larger than the sum of its proper divisors (65296581119).

1231385918401 is a wasteful number, since it uses less digits than its factorization.

1231385918401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24339815.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 1231385918401 in words is "one trillion, two hundred thirty-one billion, three hundred eighty-five million, nine hundred eighteen thousand, four hundred one".