1321221122213 has 8 divisors (see below), whose sum is σ = 1322793862656. Its totient is φ = 1319648929200.

The previous prime is 1321221122009. The next prime is 1321221122233. The reversal of 1321221122213 is 3122211221231.

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 1321221122213 - 2¹⁴ = 1321221105829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321221122233) 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, 4798520 + ... + 5066382.

It is an arithmetic number, because the mean of its divisors is an integer number (165349232832).

Almost surely, 2^{1321221122213} is an apocalyptic number.

It is an amenable number.

1321221122213 is a deficient number, since it is larger than the sum of its proper divisors (1572740443).

1321221122213 is a wasteful number, since it uses less digits than its factorization.

1321221122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273715.

The product of its digits is 576, while the sum is 23.

Adding to 1321221122213 its reverse (3122211221231), we get a palindrome (4443432343444).

The spelling of 1321221122213 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred thirteen".