13121122452331 has 4 divisors (see below), whose sum is σ = 13336222820464. Its totient is φ = 12906022084200.

The previous prime is 13121122452281. The next prime is 13121122452343. The reversal of 13121122452331 is 13325422112131.

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 13121122452331 - 2¹⁷ = 13121122321259 is a prime.

It is a super-2 number, since 2×13121122452331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121122452293 and 13121122452302.

It is not an unprimeable number, because it can be changed into a prime (13121122452371) 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, 107550183975 + ... + 107550184096.

It is an arithmetic number, because the mean of its divisors is an integer number (3334055705116).

Almost surely, 2^{13121122452331} is an apocalyptic number.

13121122452331 is a deficient number, since it is larger than the sum of its proper divisors (215100368133).

13121122452331 is an equidigital number, since it uses as much as digits as its factorization.

13121122452331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215100368132.

The product of its digits is 8640, while the sum is 31.

Adding to 13121122452331 its reverse (13325422112131), we get a palindrome (26446544564462).

The spelling of 13121122452331 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-two million, four hundred fifty-two thousand, three hundred thirty-one".