1221133121313 has 8 divisors (see below), whose sum is σ = 1860774280128. Its totient is φ = 697790355024.

The previous prime is 1221133121303. The next prime is 1221133121353. The reversal of 1221133121313 is 3131213311221.

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

It is not a de Polignac number, because 1221133121313 - 2⁴ = 1221133121297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221133121303) 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, 29074598106 + ... + 29074598147.

It is an arithmetic number, because the mean of its divisors is an integer number (232596785016).

Almost surely, 2^{1221133121313} is an apocalyptic number.

It is an amenable number.

1221133121313 is a deficient number, since it is larger than the sum of its proper divisors (639641158815).

1221133121313 is an equidigital number, since it uses as much as digits as its factorization.

1221133121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58149196263.

The product of its digits is 648, while the sum is 24.

Adding to 1221133121313 its reverse (3131213311221), we get a palindrome (4352346432534).

The spelling of 1221133121313 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-three million, one hundred twenty-one thousand, three hundred thirteen".