1401321121 has 12 divisors (see below), whose sum is σ = 1449210672. Its totient is φ = 1354804328.

The previous prime is 1401321059. The next prime is 1401321127. The reversal of 1401321121 is 1211231041.

It is not a de Polignac number, because 1401321121 - 2¹³ = 1401312929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401321095 and 1401321104.

It is not an unprimeable number, because it can be changed into a prime (1401321127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179526 + ... + 187168.

It is an arithmetic number, because the mean of its divisors is an integer number (120767556).

Almost surely, 2^1401321121 is an apocalyptic number.

It is an amenable number.

1401321121 is a deficient number, since it is larger than the sum of its proper divisors (47889551).

1401321121 is an frugal number, since it uses more digits than its factorization.

1401321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7820 (or 7773 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1401321121 is about 37434.2239267759. The cubic root of 1401321121 is about 1119.0407179892.

Adding to 1401321121 its reverse (1211231041), we get a palindrome (2612552162).

The spelling of 1401321121 in words is "one billion, four hundred one million, three hundred twenty-one thousand, one hundred twenty-one".