1213123201401 has 8 divisors (see below), whose sum is σ = 1617502868704. Its totient is φ = 808746167520.

The previous prime is 1213123201397. The next prime is 1213123201421. The reversal of 1213123201401 is 1041023213121.

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

It is not a de Polignac number, because 1213123201401 - 2² = 1213123201397 is a prime.

It is a super-2 number, since 2×1213123201401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213123201421) 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, 1049286 + ... + 1878096.

It is an arithmetic number, because the mean of its divisors is an integer number (202187858588).

Almost surely, 2^{1213123201401} is an apocalyptic number.

It is an amenable number.

1213123201401 is a deficient number, since it is larger than the sum of its proper divisors (404379667303).

1213123201401 is an equidigital number, since it uses as much as digits as its factorization.

1213123201401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316711.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1213123201401 its reverse (1041023213121), we get a palindrome (2254146414522).

The spelling of 1213123201401 in words is "one trillion, two hundred thirteen billion, one hundred twenty-three million, two hundred one thousand, four hundred one".