1000401201321 has 16 divisors (see below), whose sum is σ = 1409222534400. Its totient is φ = 630235628288.

The previous prime is 1000401201311. The next prime is 1000401201337. The reversal of 1000401201321 is 1231021040001.

It is a cyclic number.

It is not a de Polignac number, because 1000401201321 - 2⁷ = 1000401201193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000401201321.

It is not an unprimeable number, because it can be changed into a prime (1000401201311) 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, 122324256 + ... + 122332433.

It is an arithmetic number, because the mean of its divisors is an integer number (88076408400).

Almost surely, 2^{1000401201321} is an apocalyptic number.

It is an amenable number.

1000401201321 is a deficient number, since it is larger than the sum of its proper divisors (408821333079).

1000401201321 is a wasteful number, since it uses less digits than its factorization.

1000401201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244656768.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1000401201321 its reverse (1231021040001), we get a palindrome (2231422241322).

The spelling of 1000401201321 in words is "one trillion, four hundred one million, two hundred one thousand, three hundred twenty-one".