1220321222331 has 8 divisors (see below), whose sum is σ = 1629199875600. Its totient is φ = 812495025312.

The previous prime is 1220321222311. The next prime is 1220321222333. The reversal of 1220321222331 is 1332221230221.

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

It is not a de Polignac number, because 1220321222331 - 2⁵ = 1220321222299 is a prime.

It is a super-2 number, since 2×1220321222331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220321222333) 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, 263111356 + ... + 263115993.

It is an arithmetic number, because the mean of its divisors is an integer number (203649984450).

Almost surely, 2^{1220321222331} is an apocalyptic number.

1220321222331 is a deficient number, since it is larger than the sum of its proper divisors (408878653269).

1220321222331 is an equidigital number, since it uses as much as digits as its factorization.

1220321222331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526228125.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1220321222331 its reverse (1332221230221), we get a palindrome (2552542452552).

The spelling of 1220321222331 in words is "one trillion, two hundred twenty billion, three hundred twenty-one million, two hundred twenty-two thousand, three hundred thirty-one".