11331121261391 has 2 divisors, whose sum is σ = 11331121261392. Its totient is φ = 11331121261390.

The previous prime is 11331121261331. The next prime is 11331121261417. The reversal of 11331121261391 is 19316212113311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11331121261391 - 2²² = 11331117067087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331121261301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665560630695 + 5665560630696.

It is an arithmetic number, because the mean of its divisors is an integer number (5665560630696).

Almost surely, 2^{11331121261391} is an apocalyptic number.

11331121261391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331121261391 is an equidigital number, since it uses as much as digits as its factorization.

11331121261391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 35.

The spelling of 11331121261391 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred sixty-one thousand, three hundred ninety-one".