101213010091 has 2 divisors, whose sum is σ = 101213010092. Its totient is φ = 101213010090.

The previous prime is 101213010071. The next prime is 101213010121. The reversal of 101213010091 is 190010312101.

It is a weak prime.

It is an emirp because it is prime and its reverse (190010312101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101213010091 - 2²⁵ = 101179455659 is a prime.

It is not a weakly prime, because it can be changed into another prime (101213010011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606505045 + 50606505046.

It is an arithmetic number, because the mean of its divisors is an integer number (50606505046).

Almost surely, 2^101213010091 is an apocalyptic number.

101213010091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101213010091 is an equidigital number, since it uses as much as digits as its factorization.

101213010091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 101213010091 its reverse (190010312101), we get a palindrome (291223322192).

The spelling of 101213010091 in words is "one hundred one billion, two hundred thirteen million, ten thousand, ninety-one".