1213322233121 has 4 divisors (see below), whose sum is σ = 1213327666500. Its totient is φ = 1213316799744.

The previous prime is 1213322233111. The next prime is 1213322233141.

1213322233121 is nontrivially palindromic in base 10.

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 13335630400 + 1199986602721 = 115480^2 + 1095439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213322233121 - 2¹⁴ = 1213322216737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213322233111) 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, 2366696 + ... + 2833353.

It is an arithmetic number, because the mean of its divisors is an integer number (303331916625).

Almost surely, 2^{1213322233121} is an apocalyptic number.

It is an amenable number.

1213322233121 is a deficient number, since it is larger than the sum of its proper divisors (5433379).

1213322233121 is an equidigital number, since it uses as much as digits as its factorization.

1213322233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433378.

The product of its digits is 2592, while the sum is 26.

The spelling of 1213322233121 in words is "one trillion, two hundred thirteen billion, three hundred twenty-two million, two hundred thirty-three thousand, one hundred twenty-one".