1321001420401 has 16 divisors (see below), whose sum is σ = 1424235331008. Its totient is φ = 1217999390400.

The previous prime is 1321001420363. The next prime is 1321001420423. The reversal of 1321001420401 is 1040241001231.

It is not a de Polignac number, because 1321001420401 - 2¹³ = 1321001412209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321001420801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56127006 + ... + 56150536.

It is an arithmetic number, because the mean of its divisors is an integer number (89014708188).

Almost surely, 2^{1321001420401} is an apocalyptic number.

It is an amenable number.

1321001420401 is a deficient number, since it is larger than the sum of its proper divisors (103233910607).

1321001420401 is a wasteful number, since it uses less digits than its factorization.

1321001420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28272.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1321001420401 its reverse (1040241001231), we get a palindrome (2361242421632).

The spelling of 1321001420401 in words is "one trillion, three hundred twenty-one billion, one million, four hundred twenty thousand, four hundred one".