1368121331 has 2 divisors, whose sum is σ = 1368121332. Its totient is φ = 1368121330.

The previous prime is 1368121309. The next prime is 1368121373. The reversal of 1368121331 is 1331218631.

It is a weak prime.

It is an emirp because it is prime and its reverse (1331218631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1368121331 - 2⁶ = 1368121267 is a prime.

It is a super-2 number, since 2×1368121331² = 3743511952674423122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1368121294 and 1368121303.

It is not a weakly prime, because it can be changed into another prime (1368121031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684060665 + 684060666.

It is an arithmetic number, because the mean of its divisors is an integer number (684060666).

Almost surely, 2^1368121331 is an apocalyptic number.

1368121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368121331 is an equidigital number, since it uses as much as digits as its factorization.

1368121331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1368121331 is about 36988.1241887177. The cubic root of 1368121331 is about 1110.1326386962.

Adding to 1368121331 its reverse (1331218631), we get a palindrome (2699339962).

The spelling of 1368121331 in words is "one billion, three hundred sixty-eight million, one hundred twenty-one thousand, three hundred thirty-one".