1321002021041 has 8 divisors (see below), whose sum is σ = 1366584554280. Its totient is φ = 1275421537152.

The previous prime is 1321002021011. The next prime is 1321002021047. The reversal of 1321002021041 is 1401202001231.

It can be written as a sum of positive squares in 4 ways, for example, as 13933441600 + 1307068579441 = 118040^2 + 1143271^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1321002021041 - 2³⁸ = 1046124114097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321002021047) 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, 861581 + ... + 1839653.

It is an arithmetic number, because the mean of its divisors is an integer number (170823069285).

Almost surely, 2^{1321002021041} is an apocalyptic number.

It is an amenable number.

1321002021041 is a deficient number, since it is larger than the sum of its proper divisors (45582533239).

1321002021041 is an equidigital number, since it uses as much as digits as its factorization.

1321002021041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024675.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1321002021041 its reverse (1401202001231), we get a palindrome (2722204022272).

The spelling of 1321002021041 in words is "one trillion, three hundred twenty-one billion, two million, twenty-one thousand, forty-one".