1320204021121 has 8 divisors (see below), whose sum is σ = 1330550933184. Its totient is φ = 1309861185360.

The previous prime is 1320204021077. The next prime is 1320204021127. The reversal of 1320204021121 is 1211204020231.

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 1320204021121 - 2²¹ = 1320201923969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320204021127) 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, 367165 + ... + 1665898.

It is an arithmetic number, because the mean of its divisors is an integer number (166318866648).

Almost surely, 2^{1320204021121} is an apocalyptic number.

It is an amenable number.

1320204021121 is a deficient number, since it is larger than the sum of its proper divisors (10346912063).

1320204021121 is a wasteful number, since it uses less digits than its factorization.

1320204021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038151.

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

Adding to 1320204021121 its reverse (1211204020231), we get a palindrome (2531408041352).

The spelling of 1320204021121 in words is "one trillion, three hundred twenty billion, two hundred four million, twenty-one thousand, one hundred twenty-one".