1220301223231 has 4 divisors (see below), whose sum is σ = 1238514674392. Its totient is φ = 1202087772072.

The previous prime is 1220301223213. The next prime is 1220301223313. The reversal of 1220301223231 is 1323221030221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220301223231 - 2¹⁵ = 1220301190463 is a prime.

It is a super-2 number, since 2×1220301223231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220301223201) 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, 9106725480 + ... + 9106725613.

It is an arithmetic number, because the mean of its divisors is an integer number (309628668598).

Almost surely, 2^{1220301223231} is an apocalyptic number.

1220301223231 is a deficient number, since it is larger than the sum of its proper divisors (18213451161).

1220301223231 is an equidigital number, since it uses as much as digits as its factorization.

1220301223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18213451160.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1220301223231 its reverse (1323221030221), we get a palindrome (2543522253452).

The spelling of 1220301223231 in words is "one trillion, two hundred twenty billion, three hundred one million, two hundred twenty-three thousand, two hundred thirty-one".