1320233221121 has 4 divisors (see below), whose sum is σ = 1397893998852. Its totient is φ = 1242572443392.

The previous prime is 1320233221117. The next prime is 1320233221127. The reversal of 1320233221121 is 1211223320231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 709747276225 + 610485944896 = 842465^2 + 781336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320233221121 - 2² = 1320233221117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320233221127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38830388840 + ... + 38830388873.

It is an arithmetic number, because the mean of its divisors is an integer number (349473499713).

Almost surely, 2^{1320233221121} is an apocalyptic number.

It is an amenable number.

1320233221121 is a deficient number, since it is larger than the sum of its proper divisors (77660777731).

1320233221121 is an equidigital number, since it uses as much as digits as its factorization.

1320233221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77660777730.

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

Adding to 1320233221121 its reverse (1211223320231), we get a palindrome (2531456541352).

The spelling of 1320233221121 in words is "one trillion, three hundred twenty billion, two hundred thirty-three million, two hundred twenty-one thousand, one hundred twenty-one".