1231221404001 has 8 divisors (see below), whose sum is σ = 1679805946720. Its totient is φ = 801725565312.

The previous prime is 1231221403991. The next prime is 1231221404003. The reversal of 1231221404001 is 1004041221321.

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

It is not a de Polignac number, because 1231221404001 - 2⁷ = 1231221403873 is a prime.

It is a super-2 number, since 2×1231221404001² (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 (1231221404003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4772175856 + ... + 4772176113.

It is an arithmetic number, because the mean of its divisors is an integer number (209975743340).

Almost surely, 2^{1231221404001} is an apocalyptic number.

It is an amenable number.

1231221404001 is a deficient number, since it is larger than the sum of its proper divisors (448584542719).

1231221404001 is an equidigital number, since it uses as much as digits as its factorization.

1231221404001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544352015.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1231221404001 its reverse (1004041221321), we get a palindrome (2235262625322).

The spelling of 1231221404001 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, four hundred four thousand, one".