1321220331041 has 8 divisors (see below), whose sum is σ = 1422861734784. Its totient is φ = 1219580223120.

The previous prime is 1321220330999. The next prime is 1321220331107. The reversal of 1321220331041 is 1401330221231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321220331041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321220330998 and 1321220331016.

It is not an unprimeable number, because it can be changed into a prime (1321220334041) 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, 3272600 + ... + 3654086.

It is an arithmetic number, because the mean of its divisors is an integer number (177857716848).

Almost surely, 2^{1321220331041} is an apocalyptic number.

It is an amenable number.

1321220331041 is a deficient number, since it is larger than the sum of its proper divisors (101641403743).

1321220331041 is a wasteful number, since it uses less digits than its factorization.

1321220331041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647911.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321220331041 its reverse (1401330221231), we get a palindrome (2722550552272).

The spelling of 1321220331041 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, forty-one".