101224091 has 4 divisors (see below), whose sum is σ = 101361072. Its totient is φ = 101087112.

The previous prime is 101224087. The next prime is 101224099. The reversal of 101224091 is 190422101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190422101 = 1187 ⋅160423.

It is a cyclic number.

It is not a de Polignac number, because 101224091 - 2² = 101224087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101224099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67376 + ... + 68861.

It is an arithmetic number, because the mean of its divisors is an integer number (25340268).

Almost surely, 2^101224091 is an apocalyptic number.

101224091 is a deficient number, since it is larger than the sum of its proper divisors (136981).

101224091 is an equidigital number, since it uses as much as digits as its factorization.

101224091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136980.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 101224091 is about 10061.0183878174. The cubic root of 101224091 is about 466.0451168043.

Adding to 101224091 its reverse (190422101), we get a palindrome (291646192).

The spelling of 101224091 in words is "one hundred one million, two hundred twenty-four thousand, ninety-one".