123220131331 has 4 divisors (see below), whose sum is σ = 134421961464. Its totient is φ = 112018301200.

The previous prime is 123220131319. The next prime is 123220131347. The reversal of 123220131331 is 133131022321.

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 123220131331 - 2¹³ = 123220123139 is a prime.

It is a super-2 number, since 2×123220131331² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220131301) 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, 5600915050 + ... + 5600915071.

It is an arithmetic number, because the mean of its divisors is an integer number (33605490366).

Almost surely, 2^123220131331 is an apocalyptic number.

123220131331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123220131331 is a deficient number, since it is larger than the sum of its proper divisors (11201830133).

123220131331 is a wasteful number, since it uses less digits than its factorization.

123220131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11201830132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123220131331 its reverse (133131022321), we get a palindrome (256351153652).

The spelling of 123220131331 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred thirty-one thousand, three hundred thirty-one".