91213330127 has 2 divisors, whose sum is σ = 91213330128. Its totient is φ = 91213330126.

The previous prime is 91213330099. The next prime is 91213330151. The reversal of 91213330127 is 72103331219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91213330127 - 2⁸ = 91213329871 is a prime.

It is a super-2 number, since 2×91213330127² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91213330093 and 91213330102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91213330027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45606665063 + 45606665064.

It is an arithmetic number, because the mean of its divisors is an integer number (45606665064).

Almost surely, 2^91213330127 is an apocalyptic number.

91213330127 is a deficient number, since it is larger than the sum of its proper divisors (1).

91213330127 is an equidigital number, since it uses as much as digits as its factorization.

91213330127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The spelling of 91213330127 in words is "ninety-one billion, two hundred thirteen million, three hundred thirty thousand, one hundred twenty-seven".