101223100091 has 2 divisors, whose sum is σ = 101223100092. Its totient is φ = 101223100090.

The previous prime is 101223100061. The next prime is 101223100093. The reversal of 101223100091 is 190001322101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101223100091 - 2¹⁰ = 101223099067 is a prime.

It is a super-2 number, since 2×101223100091² (a number of 23 digits) contains 22 as substring.

Together with 101223100093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101223100093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50611550045 + 50611550046.

It is an arithmetic number, because the mean of its divisors is an integer number (50611550046).

Almost surely, 2^101223100091 is an apocalyptic number.

101223100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101223100091 is an equidigital number, since it uses as much as digits as its factorization.

101223100091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 101223100091 its reverse (190001322101), we get a palindrome (291224422192).

The spelling of 101223100091 in words is "one hundred one billion, two hundred twenty-three million, one hundred thousand, ninety-one".